Tutorials may use diff syntax to show edits:

```diff
 this is some code
-delete red - lines
+add green + lines
```


**How to add a new…**

- [Type (Fairy)](Add-a-new-Fairy-type)
- [Item (including a healing item, held item, Poké Ball, evolution stone, Town Map, etc)](Add-different-kinds-of-new-items)
- [TM (up to 120 TMs)](Add-a-new-TM)
- [Music song](Add-a-new-music-song)

**Upgrades to existing features:**

- [Expand tilesets from 192 tiles to 255](Expand-tilesets-from-192-tiles-to-255)
- [Allow map tiles to appear above sprites (so NPCs can walk behind tiles) with `PRIORITY` colors](Allow-map-tiles-to-appear-above-sprites-\(so-NPCs-can-walk-behind-tiles\)-with-PRIORITY-colors)
- [Remove the 25% failure chance for AI status moves](Remove-the-25%25-failure-chance-for-AI-status-moves)
- [Colored trainer card badges](Colored-trainer-card-badges)

**Features from later generations:**

- [Automatically reuse Repel](Automatically-reuse-Repel)