diff --git a/constants/pokemon_constants.asm b/constants/pokemon_constants.asm
index 53de0a3cd..91ff79f2b 100644
--- a/constants/pokemon_constants.asm
+++ b/constants/pokemon_constants.asm
@@ -16,6 +16,7 @@
 ; - AnimationExtraPointers (see gfx/pokemon/extra_pointers.asm)
 ; - BitmasksPointers (see gfx/pokemon/bitmask_pointers.asm)
 ; - FramesPointers (see gfx/pokemon/frame_pointers.asm)
+; - Footprints (see gfx/footprints.asm)
 ; - SortedPokemon (see mobile/fixed_words.asm)
 const_value set 1
 	const BULBASAUR  ; 01
diff --git a/gfx/footprints.asm b/gfx/footprints.asm
index cfcdc0c09..24b4e2e92 100644
--- a/gfx/footprints.asm
+++ b/gfx/footprints.asm
@@ -7,6 +7,8 @@
 footprint_top    EQUS "0,                 2 * LEN_1BPP_TILE"
 footprint_bottom EQUS "2 * LEN_1BPP_TILE, 2 * LEN_1BPP_TILE"
 
+; Entries correspond to Pokémon species, two apiece, 8 tops then 8 bottoms
+
 ; 001-008 top halves
 INCBIN "gfx/footprints/bulbasaur.1bpp",  footprint_top
 INCBIN "gfx/footprints/ivysaur.1bpp",    footprint_top