Highlands

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.

Highlands Biomes
minecraft:plains	minecraft:sunflower_plains	minecraft:meadow
terralith:brushland	terralith:steppe	terralith:valley_clearing
terralith:alpine_highlands	terralith:arid_highlands	terralith:blooming_plateau
terralith:highlands	byg:allium_fields	byg:amaranth_fields
byg:autumnal_valley	byg:coconino_meadow	byg:prairie
byg:rose_fields	wythers:berry_bog	wythers:cool_forest_edge
wythers:dry_tropical_grassland	wythers:forest_edge	wythers:spring_flower_fields
wythers:subtropical_forest_edge	wythers:tropical_grassland	wythers:bamboo_jungle_highlands
wythers:eucalyptus_deanei_forest	wythers:forested_highlands	wythers:highlands
wythers:huangshan_highlands	wythers:highland_tropical_rainforest	wythers:jade_highlands
wythers:wistman_woods