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Dive

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Rangi edited this page Aug 20, 2018 · 11 revisions

Gen 3 introduced Dive, a field move that can reach the seafloor, as HM08. Fully implementing Dive is fairly complicated: its in-battle effect is similar to Dig and Fly but not exactly the same, and its field effect requires a lot of changes.

(The code for this feature was adapted from Pokémon Orange.)

Here are all the changes needed to implement Dive, applied to a copy of pokecrystal. You can clone Rangi42/pokecrystal and checkout the dive branch to test it for yourself.

Screenshot

TOC

TODO

1. Start to prepare the Dive move

Refer to this tutorial.

  • constants/move_constants.asm
  • data/moves/names.asm
  • data/moves/descriptions.asm
  • data/moves/moves.asm
  • data/pokemon/evos_attacks.asm

2. Create the Dive move animation

  • constants/battle_anim_constants.asm
  • data/battle_anims/objects.asm
  • data/moves/animations.asm

3. Using Dive hides the Pokémon underwater

  • constants/battle_constants.asm
  • wram.asm
  • engine/battle/core.asm
  • engine/battle/effect_commands.asm
  • engine/battle_anims/bg_effects.asm
  • engine/battle/ai/scoring.asm

4. Surf and Whirlpool do double damage to underwater Pokémon

  • constants/move_effect_constants.asm
  • data/moves/moves.asm (again)
  • data/moves/effects_pointers.asm
  • data/moves/effects.asm
  • macros/scripts/battle_commands.asm
  • data/battle/effect_command_pointers.asm
  • engine/battle/effect_commands.asm (again)
  • engine/battle/ai/scoring.asm (again)

5. Prepare the HM08 item

Refer to this tutorial.

  • constants/item_constants.asm
  • data/items/names.asm
  • data/items/attributes.asm
  • data/moves/tmhm_moves.asm
  • home/hm_moves.asm
  • data/pokemon/base_stats/*.asm

6. Define collision types for Dive water

  • constants/collision_constants.asm
  • data/collision_permissions.asm
  • engine/overworld/tile_events.asm

7. Start to prepare the Dive field move effect

Refer to this tutorial.

  • constants/menu_constants.asm
  • data/mon_menu.asm
  • engine/menus/start_menu.asm

8. Define a utility function to check for Dive water

  • home/map_objects.asm

9. Define text related to using Dive

  • data/text/common_2.asm

10. Define the divemap and divewarp event commands

  • wram.asm
  • macros/scripts/events.asm
  • engine/overworld/scripting.asm
  • home/flag.asm
  • engine/overworld/warp_connection.asm

11. Finish the Dive field move effect

  • engine/events/overworld.asm

12. Press A on Dive water to use Dive

  • engine/overworld/events.asm

13. Design a sprite for swimming underwater

Refer to this tutorial.

  • gfx/sprites/dive.png
  • constants/sprite_constants.asm
  • data/sprites/sprites.asm
  • gfx/sprites.asm

14. Use the sprite for the player when underwater

  • constants/wram_constants.asm
  • data/sprites/player_sprites.asm
  • engine/events/overworld.asm (again)
  • engine/overworld/map_setup.asm
  • engine/overworld/player_movement.asm

15. Start creating a unique tileset for underwater maps

Refer to this tutorial.

  • constants/tileset_constants.asm
  • gfx/tilesets/underwater.png
  • gfx/tilesets/underwater_palette_map.asm
  • data/tilesets/underwater_metatiles.bin
  • data/tilesets/underwater_collision.asm
  • data/tilesets.asm
  • gfx/tileset_palette_maps.asm
  • gfx/tilesets.asm

16. Can't Fly while underwater

  • engine/events/overworld.asm (again)

17. Fix bugs that affect the Dive features

  • engine/overworld/overworld.asm
  • home/map.asm

18. Animate underwater seaweed and bubbles

  • gfx/tilesets/bubble/1.png
  • gfx/tilesets/bubble/2.png
  • gfx/tilesets/bubble/3.png
  • gfx/tilesets/bubble/4.png
  • gfx/tilesets/bubble/5.png
  • gfx/tilesets/seaweed/1.png
  • gfx/tilesets/seaweed/2.png
  • engine/tilesets/tileset_anims.asm

17. Use special palettes for underwater tiles and sprites

  • gfx/tilesets/underwater.pal
  • gfx/tilesets/underwater_sprites.pal
  • engine/tilesets/tileset_palettes.asm
  • engine/gfx/color.asm

19. Receive HM08 Dive and explain it

  • constants/event_flags.asm
  • maps/CeruleanGym.asm

20. Add deep water to an overworld tileset

  • gfx/tilesets/johto.png
  • gfx/tilesets/johto_palette_map.asm
  • data/tilesets/johto_collision.asm
  • data/tilesets/johto_metatiles.bin
  • gfx/tilesets/water/deep-water.png
  • engine/tilesets/tileset_anims.asm (again)

21. Add a map with Dive spots

Refer to this tutorial.

  • maps/Route41.blk
  • maps/Route41.asm
  • maps/Route41Underwater.blk
  • maps/Route41Underwater.asm
  • constants/event_flags.asm (again)
  • constants/map_constants.asm
  • data/maps/maps.asm
  • data/maps/attributes.asm
  • data/wild/johto_grass.asm
  • data/maps/blocks.asm
  • data/maps/scripts.asm
  • data/maps/roofs.asm
  • data/maps/outdoor_sprites.asm
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