As Chopper can transform into a literal giant using a rumble ball Chopper does enjoy playing pranks on his teammates. He also has a variety of other forms but while on the ice seeing a 2 foot player turn into a 20 foot one and then the "big bad badass" player on the team that the entire league fears is put on his ass, makes for quite a sight. Chopper also spends some time setting up elaborate practical jokes using his medical expertise which enables him to make a variety of mixtures that are never lethal but have some hilarious side effects that can most definitely make his team stumble during a practice or even go for a snooze on the ice. While Chopper is a practical jokester it is all in good fun as he would not want to significantly harm anyone on his team. Now other teams on the other hand are a different story so long as they can recover from the broken nose, they received as their skate blades were dulled between periods.