Man, you just butchered the shit out of that. Get the lyrics right first.
LINE: Put a motherfucker on ice like the MAPLE LEAVES
INTERPRETATION: When a person is dead, you put them on ice so their body doesn't rot.
LINE: That's a hockey team and I ain't on no hockey team
INTERPRETATION: The Toronto Maple Leaves are a hockey team, who play on ice, as he states. He Isn't on a hockey team, but as the next line states, he's still a champion.
LINE: I'm a champion, where's the fucking ROCKY THEME
INTERPRETATION: Rocky, the boxer, is a champion, who has a theme song.
LINE: Damn, rest in peace Apollo Creed
INTERPRETATION: Apollo Creed was a boxer in the aforementioned ROCKY movie, who died after being beaten badly by some huge ass dude.
LINE: I'm a monster, everyday is halloween
INTERPRETATION: It's a random line, he is saying that he is monsterous, an adjective to describe himself/style, and monsters come out on halloween, hence the "everyday is halloween"
After reading all that, try and explain to me again how that verse doesn't make any sense.