Similar to Blocky, Snowball appears to always be mean or make fun of Bubble, but Bubble doesn't seem to hate Snowball.
Episodes suggesting a conflict
In "Power of Three", Snowball pushes Bubble and her alliance off the bridge during the contest.
In "Crybaby!", Bubble wanted Teardrop to join her team instead of Snowball because she thinks he's "not so smart"; this makes Snowball angry. Bubble is frowning when Snowball is saved from elimination.
In "A Leg Up in the Race", Bubble laughs at Snowball after he loses 18 points.
In "Don't Lose Your Marbles", Snowball pops Bubble with his finger and is proud of it.
In "Questions Answered", Snowball helps Match to pressure Bubble to make her answer the questions correctly. Snowball can be seen face-palming when Bubble keeps hitting the fake buzzer.
In "What Do You Think of Roleplay?", Snowball pops Bubble when she tries to forgive him, then pops her again when she forgives him for the second time.
In "Crybaby!", when Snowball asks his team if they're ready to go down the hill, Bubble says "Not quite".
Episodes suggesting a friendship
In "What Do You Think of Roleplay?", Bubble forgives Snowball to prevent him from being eliminated.
In "Return of the Rocket Ship", Snowball notices Bubble is still underneath Team Ice Cube!. Snowball is noticeably concerned for Bubble. Snowball, along with the rest of his team, saves Bubble by preventing Beep from landing on her. Snowball happily declares they have saved Bubble. Snowball is shocked when Bubble is accidentally killed by Flower and Team Ice Cube!.