Luigi’s Challenge 1 1/2 ep 5 / THE GRAND FINALE!!  

Music
Happy Delightful Adventures - Super Mario RPG
Champion fight - Pokémon Diamond/Pearl 
Hiding the secrets - DOOM
The Emperor Balblax - Pikmin
Bowser message - Super Mario 64
Arceus - Pokémon Diamonds/Pearl
Giga Bowser - by Dethraxx
Bowser fight - Mario and Luigi Partners in time
Battle against Meta Knight - Kirby Super Star (DS)
Meta Knights theme - Kirby and the Forgotten World
Victory Mario - Super Smash Bros Brawl
Duel of the Fates - Angry Birds Star Wars
Victory - Super Mario 64
Menu - Mario Kart 8 Deluxe 
Koopa - Super Mario Kart
Prince Mush - Paper Mario TTYD (remake)
Bowser’s theme - Paper Mario TTYD
Battle against Meta Knight - Kirby Super Star
Toy Time Galaxy - Super Mario Galaxy
Nick Bruiser - Super Punch Out