Seven Nights at Smash Ruins. Characters in order of appearance: 1. Killing Fist 2. Hydro Scope 3. Dragon Smoke Ball 4. Stone Diver 5. Spore Bomb 6. Venomous Sprout 7. Rocket Beetle 8. Winged Beastball 9. Flaming Bellows 10. Frozen Staff 11. Psychic Killer Eye 12. Alloy Nut 13. Electric Unira 14. Shadow Blaster 15. Phantom Club
Inspired by UCN (Ultimate Custom Night), I have combined certain Smash Items from BOSIFED with Pokémon elements. Ps.: there's also 2 other characters I couldn't add: Tectonic Drill and Fairy Sensor Bomb. Credit to Nintendo for SSBU