Walu-Sam

Appearances:
Episode 1

Episode 2

Episode 3

Episode 4

Episode 5

Episode 6

Episode 7

Episode 8

Episode 9

Episode 10

Episode 11 (season finale)

Stats:
Eliminations: 1

Victories: 2 (Episode 2, Episode 6)

Season 1 -
When Sam was invited to Death Ceiling, he didn't just want to be another name in the crowd. He wanted a well known individual associated with him, to jumpstart his fanbase. He eventually landed on Waluigi. Using a dark spell, Sam fused their essences, causing Waluigi to be a passenger in his own body.

For all of Season 1, Waluigi fought to be free, and Sam fought to stay fused as one, eventually Wario's sadness for the loss of his brother got to Sam, and he forfeit the spell, freeing them from each other. Although Waluigi was furious, he knew all to well what being side character did to someone, and offered forgiveness.

Season 2 -
To start his atonement, Sam gave Waluigi the titles they had won while fused. It was the first time Waluigi had something to show for an accomplishment, so he accepted. They tried out being separate competitors in Death ceiling revelation, but afterword, Waluigi took time away from Death Ceiling to catch up on his own life. Sam however, decided to keep at it and rightfully earn a title on his own.