Fix snake_case filenames

Renamed a bunch of files, most of them one-off functions, to better fit
the general snake_case naming scheme. Also renamed some awfully long filenames.

engine/pokemon/correct_party_errors.asm

@@ -0,0 +1,229 @@
+Unreferenced_CorrectPartyErrors:
+	ld hl, wPartyCount
+	ld a, [hl]
+	and a
+	ret z
+
+	cp PARTY_LENGTH + 1
+	jr c, .party_length_okay
+	ld a, PARTY_LENGTH
+	ld [hl], a
+.party_length_okay
+	inc hl
+
+	ld b, a
+	ld c, 0
+.loop1
+	ld a, [hl]
+	and a
+	jr z, .invalid_species
+	cp NUM_POKEMON + 1
+	jr z, .invalid_species
+	cp EGG + 1
+	jr c, .next_species
+
+.invalid_species
+	ld [hl], SMEARGLE
+	push hl
+	push bc
+	ld a, c
+	ld hl, wPartyMon1Species
+	call GetPartyLocation
+	ld [hl], SMEARGLE
+	pop bc
+	pop hl
+
+.next_species
+	inc hl
+	inc c
+	dec b
+	jr nz, .loop1
+	ld [hl], $ff
+
+	ld hl, wPartyMon1
+	ld a, [wPartyCount]
+	ld d, a
+	ld e, 0
+.loop2
+	push de
+	push hl
+	ld b, h
+	ld c, l
+	ld a, [hl]
+	and a
+	jr z, .invalid_species_2
+	cp NUM_POKEMON + 1
+	jr c, .check_level
+
+.invalid_species_2
+	ld [hl], SMEARGLE
+	push de
+	ld d, 0
+	ld hl, wPartySpecies
+	add hl, de
+	pop de
+	ld a, SMEARGLE
+	ld [hl], a
+
+.check_level
+	ld [wCurSpecies], a
+	call GetBaseData
+	ld hl, MON_LEVEL
+	add hl, bc
+	ld a, [hl]
+	cp MIN_LEVEL
+	ld a, MIN_LEVEL
+	jr c, .invalid_level
+	ld a, [hl]
+	cp MAX_LEVEL
+	jr c, .load_level
+	ld a, MAX_LEVEL
+.invalid_level
+	ld [hl], a
+.load_level
+	ld [wCurPartyLevel], a
+
+	ld hl, MON_MAXHP
+	add hl, bc
+	ld d, h
+	ld e, l
+	ld hl, MON_STAT_EXP - 1
+	add hl, bc
+	ld b, TRUE
+	predef CalcMonStats
+	pop hl
+	ld bc, PARTYMON_STRUCT_LENGTH
+	add hl, bc
+	pop de
+	inc e
+	dec d
+	jr nz, .loop2
+
+	ld de, wPartyMonNicknames
+	ld a, [wPartyCount]
+	ld b, a
+	ld c, 0
+.loop3
+	push bc
+	call .GetLengthOfStringWith6CharCap
+	push de
+	farcall CheckStringForErrors
+	pop hl
+	pop bc
+	jr nc, .valid_nickname
+
+	push bc
+	push hl
+	ld hl, wPartySpecies
+	push bc
+	ld b, 0
+	add hl, bc
+	pop bc
+	ld a, [hl]
+	cp EGG
+	ld hl, .TAMAGO
+	jr z, .got_nickname
+	ld [wd265], a
+	call GetPokemonName
+	ld hl, wStringBuffer1
+.got_nickname
+	pop de
+	ld bc, MON_NAME_LENGTH
+	call CopyBytes
+	pop bc
+
+.valid_nickname
+	inc c
+	dec b
+	jr nz, .loop3
+
+	ld de, wPartyMonOT
+	ld a, [wPartyCount]
+	ld b, a
+	ld c, 0
+.loop4
+	push bc
+	call .GetLengthOfStringWith6CharCap
+	push de
+	farcall CheckStringForErrors
+	pop hl
+	jr nc, .valid_ot_name
+	ld d, h
+	ld e, l
+	ld hl, wPlayerName
+	ld bc, NAME_LENGTH
+	call CopyBytes
+.valid_ot_name
+	pop bc
+	inc c
+	dec b
+	jr nz, .loop4
+
+	ld hl, wPartyMon1Moves
+	ld a, [wPartyCount]
+	ld b, a
+.loop5
+	push hl
+	ld c, NUM_MOVES
+	ld a, [hl]
+	and a
+	jr z, .invalid_move
+	cp NUM_ATTACKS + 1
+	jr c, .moves_loop
+.invalid_move
+	ld [hl], POUND
+
+.moves_loop
+	ld a, [hl]
+	and a
+	jr z, .fill_invalid_moves
+	cp NUM_ATTACKS + 1
+	jr c, .next_move
+
+.fill_invalid_moves
+	xor a
+	ld [hli], a
+	dec c
+	jr nz, .fill_invalid_moves
+	jr .next_pokemon
+
+.next_move
+	inc hl
+	dec c
+	jr nz, .moves_loop
+
+.next_pokemon
+	pop hl
+	push bc
+	ld bc, PARTYMON_STRUCT_LENGTH
+	add hl, bc
+	pop bc
+	dec b
+	jr nz, .loop5
+	ret
+; 13b6b
+
+.TAMAGO: ; 13b6b
+	db "タマゴ@@@"
+; 13b71
+
+.GetLengthOfStringWith6CharCap: ; 13b71
+	push de
+	ld c, 1
+	ld b, NAME_LENGTH_JAPANESE
+.search_loop
+	ld a, [de]
+	cp "@"
+	jr z, .done
+	inc de
+	inc c
+	dec b
+	jr nz, .search_loop
+	dec c
+	dec de
+	ld a, "@"
+	ld [de], a
+.done
+	pop de
+	ret
+; 13b87