Arid

Spawning data tags simply contain a list of Biomes. If you're referring to this list for a Pokemon, please double-check if it has an Anti Condition or Anti Biome. Anti Conditions and Anti Biomes are a way to essentially state: not in this biome/condition, so you'll need to cross-reference them. For instance, if a Pokemon is set to spawn in is_ocean, but has an anti condition of is_cold, it will not spawn in cold oceans.

Our Pokemon spawns are generally based on default Cobblemon configurations with additions to allow the entire dex to spawn in all Minecraft biomes and supported biome mods. Most biome mods are supported such as Terralith, Oh Biomes You'll Go, Incendium, Better Nether, Gardens of the Dead, and The Bumblezone. Other biome mods may also be compatible, provided they label their biomes with data tags.

Arid Biomes
minecraft:badlands	minecraft:eroded_badlands	minecraft:wooded_badlands
minecraft:desert	minecraft:savanna	minecraft:savanna_plateau
minecraft:windswept_savanna	terralith:ashen_savanna	terralith:red_oasis
terralith:warped_mesa	terralith:white_mesa	terralith:arid_highlands
terralith:brushland	terralith:desert_oasis	terralith:fractured_savanna
terralith:hot_shrubland	terralith:savanna_badlands	terralith:savanna_slopes
terralith:shrubland	terralith:ancient_sands	terralith:desert_canyon
terralith:cave/desert_caves	terralith:desert_spires	terralith:lush_desert
terralith:sandstone_valley	byg:atacama_desert	byg:mojave_desert
byg:windswept_desert	wythers:danakil_desert	wythers:granite_canyon
wythers:tropical_forest_canyon	wythers:tropical_forest	wythers:is_desert
wythers:badlands_desert	wythers:desert_island	wythers:kwongan_heath
wythers:outback_desert	wythers:red_desert	wythers:sandy_jungle