Heraldic beasts.
Flordelynx
Serpiedril
Falconquer

sugar glider, prairie dog, shoebill, lemur, stick insect, cardinal, cockroach, porpoise, chambered nautilus

Mankey, Tangela, Cacnea variant + evo
Dewgong, Sigilyph variant only
Girafarig, Sunflora evo only

Stat Crystals.
Maxes 1 stats, greatly debuffs others, 3 turns

Two Leagues.
Version exclusive (sort of), 8 gyms each, no normal & dark
others can be battled post-game
chemist, tailor, sculptor, spelunker, rich businessman, fantasy author, bodybuilder, pop star, retired aviator, flower farmer, weirdo, housewife, monk, diver, laywer, street magician, former champion

Box legends.
Cockatrice, Basilisk

Team Cork & Screw
Self-righteous Peacekeepers VS rabble-rousers

No full voice acting
Rotom bike, glider, climbing gear
Camping & cooking returns
Crafting (mostly apricorn)