An event spawner lets you create new events on the game map by copying template events from another map.

This spawner reuses unspawned events, allowing you to spawn and unspawn endlessly with zero performance loss, no matter how long the player keeps playing.

Your game will feel the same after 20 hours of continuous spawning and unspawning  as it does after 2 minutes, all without ever needing to change maps.

A complete object pooling, event management, and persistence system packaged inside an Event Spawner that works in both RPG Maker MV & MZ!

[Under Construction]
11/28/2025

If you're seeing this right now, that means you're very early to the 2.0 Release.
I'm actively updating this page right now, if something is missing or links aren't clickable then be sure to check back soon!
Additional Documentation and Guides will roll out over the coming days.

An Event Spawner which recycles unspawned events!

Ritter Ultimate Event Spawner

The Ritter Ultimate Event Spawner intelligently recycles unneeded events before creating new ones, preventing event clutter and keeping your maps running at peak performance.
When used as designed, your game will never suffer framerate drops from excessive spawning and unspawning of events. Ever.

This plugin turns RPG Maker into a dynamic, event-streaming engine capable of handling far more content than the default system was ever designed for.

Key Features

• Cross Engine Compatibility! MV & MZ!
One Plugin File, Two Engines!

• Unlimited Spawn / Template Maps
Organize your spawnable events across as many separate maps as you like.
Keep your project clean and flexible by grouping events by region, type, or purpose.

• Spawn Events by Coordinates or Region IDs
Spawn events precisely at specific coordinates, or let the system choose a random, valid tile marked with the Region IDs you choose.
Perfect for randomized encounters, loot spawns, NPC scattering, ambient activity, vegetation generation, and more.
Know your events! Identify the event you spawned! Scripting Guide!

• True Saved Event Persistence
Any spawned event can become a saved event, preserving:

• position

• direction

• page state

• eventId

• self switches

• movement

• custom data

Saved events automatically return when the player re-enters the map, loads a save, changes scenes, or resumes play.

Saved events are not recycled, so keep that in mind while developing your systems. They maintain ownership of their eventIds.

• Restore Unspawned Saved Events Exactly as They Were
Saved Events unspawned through calls to Ritter.unspawnEvent can be restored in their exact previous condition; same page,  same state; as if they never left.

• Dynamic Event Transformation
Transform events on the active map using a template from another map.
Great for evolving objects, multi-stage NPCs, enemy transformations, or event upgrades based on player progress.

• Full Integration with the Ritter Boundary System
Combine this spawner with the Boundary System to create powerful dynamic worlds:

• automatic spawning when the player approaches

• automatic event unspawning and recycling when the player gets too far away

• endless enemies

• dynamic populations

• fully reactive, performance-friendly maps

The two plugins together form a complete open-world streaming solution for RPG Maker.

Major Update v2.0!

November 27, 2025

Huge upgrade to the Event Spawners core system, rebuilt for power, performance, stability, and ease-of-use.

• Cross Engine Support! MV & MZ!
  • One plugin file, Two Engines! Use this plugin in either MV or MZ projects!
• Complete Backend Rewrite For Improved Performance and Stability!
  • Faster spawning, cleaner memory use, and dramatically improved handling of spawning large numbers of events in a single frame.
• Smart Region-Based Spawning System
  • Fully optimized region scanning & tile system for ultra-fast placement on large maps.
• Sprite Recycling & Rendering Improvements
  • Smarter sprite handling reduces memory footprint.
• New Save/Load-Safe Conflict Resolution System
  • Automatically detects conflicting event IDs and resolves them cleanly by assigning safe, fresh IDs. *Defensive guard*
• Improved Developer API
  • Cleaner commands, and a clean new method for accessing the event you just spawned.
• Boundary System Updates Here!

Script Calls & Plugin Commands

• Ritter.spawnEvent(spawnMapId, spawnEventId, x, y, save, spawnOnEvents)
• Ritter.spawnEventRegion(spawnMapId, spawnEventId,  regions)
• Ritter.transformEvent(eventId, spawnMapId, spawnEventId)
• Ritter.unspawnEvent(eventId, removeSave)
• Ritter.unspawnAll(removeSave)

Full Event Spawner Documentation Here!

Frequently Asked Questions

(Some or all of these guides will continue to be updated in the coming days, as more will be added)

• How do I know what event I just spawned?
  • Know Your Events! A Simple Scripting Guide!
• How does event recycling work?
  • Event Recycling! A Technical Breakdown!
• Where can I find documentation for Script Calls & Plugin Commands?
  • Script Calls & Plugin Commands Documentation!
• Is your plugin code obfuscated?
  • No, the codebase is readily available to you to modify to fit your project if necessary.
• What is the Boundary System? How can it help my game?
  • Boundary System Introduction!
• How do I create boundaries?
  • Boundary Creation Guide!
• Where can I find documentation on Boundary System Script Calls & Plugin Commands?
  • Boundary System Script Calls & Plugin Commands Guide!

Dynamic Event Streaming Powered by Boundaries

The Ritter Boundary System transforms your game maps into fully dynamic, performance-friendly environments. When paired with event recycling from Ritter Ultimate Event Spawner, you unlock a system that only creates events when they’re needed, and removes them the moment they’re not.

This gives you the freedom to build larger, denser, more interactive maps without sacrificing performance or filling your map with hundreds of permanent events.

Events only exist when the player is close enough to matter.
ABS Enemies, NPCs, objects, interactable events, triggers, effects, all spawned automatically, despawned automatically.

Just set a boundary, choose what it should spawn, and let the system handle the rest.
Including preloading events to spawn when needed using x,y locations or a random tile by regionId.

Why You Want This in Your Game

• Huge performance gains: Only active areas of the map contain events.

• Endless content systems: Infinite enemies, random encounters, dynamic NPCs, randomized debris and vegetation, among countless other possibilities!

• Cleaner maps: No more cluttering your maps with hundreds of events “so my map doesn't feel empty.” Allow your map to feel full, without cluttering the game map with real events!

• Smarter worlds: Your maps feel alive, dynamic, and reactive to the player.

• Massively reduced manual work: Boundaries automate everything from spawning, unspawning, recycling, and restoring. With the option of having more complete control with plugin commands(MZ) and script calls.

• Works on any map genre: overworlds, dungeons, cities, survival, roguelikes, farming sims, action RPGs… anything that requires a lot of events.

The Boundary + Spawner Partnership

Together, these plugins give you:

• Spawn Zones that follow the player or any event

• Auto-unspawn zones for recycling events

• Full event persistence and state-saving

• Dynamic, scalable encounters

• Clean, controlled event caps for stable performance

This is effectively a 2D world-streaming system for RPG Maker. Your maps stay responsive and performant, no matter how many events you want to bring to life.

Want the full picture?

Check out the dedicated forum post Guides for:

• Boundary System – Introduction

• Boundary System Best Practices

• Where to Start (Quick Setup Guide)

• Advanced Techniques and Examples

Terms of Use:

• You are granted non-exclusive rights to use this plugin for Commercial and Non-Commercial Use in as many projects as you wish to create.
• Do not redistribute this plugin without permission.
• Do not take code from this plugin without permission.
• Do not remove my name from @Author.
• Do not take credit for creating this plugin.
• Editing of code is allowed as long as it's within plugin file.
• I do not offer support for any changes made to plugin code.
• While it's not mandatory please consider crediting me in your game credits:
  • (Something similar to this would be great, or whatever fits your game)
  • Ultimate Event Spawner Plugin
  • Craig "Ritter" Barger
  • https://notritter.itch.io/

Version Log:

• 1.0: Released Plugin.
• 1.1: Discovered, Isolated, and Fixed a rare crash relating to unspawning an unspawned event and then changing scenes.
• 1.2: Added spawning events by "SpawnMapName" & "EventName".
  • Added unspawning events by x, y location.
  • Added ability to easily edit boundary properties.
  • Added new boundary script calls for filling boundaries with events.
  • Added unspawnEventInBoundary script call.
• 1.5: Added Plugin Commands for Event Spawner.
  • Added Plugin Commands for Boundary System.
  • Added Automated Boundaries.
  • Added Saved Boundary Events.
  • Added Developer Mode Warning Alerts. (Work in Progress)
  • Added Info Text Throughout Plugin Code.
  • Fixed an issue with recycled event sprites not being removed completely.
  • Fixed a Bug with Boundary Saved Events. (August 23, 2021)
• 1.6: Made Load Spawn Map code a lot cleaner and more efficient.
  • Moved all SpawnMap Data into one Object. $MapData[mapId].
• 1.7: Compatible with RPG Maker MZ Corescript 1.7.
• 1.8: Made some optimization improvements to Boundary System Auto Boundaries.
  • This should result in better performance under heavy load.
• 1.9: Fixed a crash relating to saved events.
• 1.9b: Fixed: Situational crash on playtest launch ("Cannot set property 'events' of undefined") caused by timing issue when preloading maps.
• 1.9c: Added ability to spawn events on top of events when using spawnEvent and  spawnEventRegion.
• 2.0: Major Update!
  • Cross-engine support (MV + MZ)
  • Fully optimzed event spawner core
  • Boundary system improvements and integrations
  • Performance enhancements for massive event streaming
  • Improved developer API and plugin commands
  • Minor bug fixes and stability improvements

Is this spawner missing a feature you need?

Have any ideas on expanding this plugin further?

I'd love to hear your thoughts in the suggestion forums below and if they're reasonable I'll see about adding them into the spawner!

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It helps other developers discover the plugin and supports future updates. Thank you!

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