Waluigi vs. a gauntlet of potential SSB characters

Waluigi is sick of being excluded from Smash. Masahiro Sakurai makes him an offer - if he can defeat a gauntlet of other characters he's considering for SSB, then he gets in the game.

Waluigi receives 48 hours of prep time for each match, and heals fully in-between each match. Feats from any game he appears in are valid. He has access to any items/things he could reasonably acquire.

• Round 1: Tingle (Zelda)
• Round 2: Ice Climbers
• Round 3: Knuckles (Sonic)
• Round 4: Krystal (Star Fox)
• Round 5: Rex (Xenoblade Chronicles)
• Round 6: Chrom (Fire Emblem)
• Round 7: Ridley (Metroid)
• Round 8: King K. Rool (Donkey Kong)
• Round 9: Decidueye (Pokemon)
• Round 10: Sans (Undertale)

BONUS: Can Waluigi continue his run of victories?

• Round 11: John Cena (WWE), Shrek, and Cory Baxter (Cory in the House)
• Round 12: REGGIE

OTHER CONSIDERATIONS: If these battle are a terrible loss for Waluigi, what would change if he had access to Wario's entire fortune?