During gameplay if you just leave Spike without touching any controls just wait a few minutes and he will do several things. He will Fall Asleep,Listen to music,Use his gadgets for practice,Dance,and more.
I'm sure everyone knows about this... Use your Stun Club and whack a monkey. He'll be stunned for a second and that's the best time to whip out your Net and catch him! Use the Dash Hoop for fast monkeys (monkeys with blue pants and a 5 speed attribute).
Ski Mini-game - requires 10 specter coins
Boxing mini-game - requires 20 specter coins
Space min-game - requires 40 specter coins
Defeat the extra boxers in the Specter Boxing mini-game at Championship mode.
Equip the stun club or time net and rotate the right thumbstick. When spike starts spinning he will land without getting hurt. This is good it you don't have the skyflyer yet.
Press L1 + R1 during the Ski mini-game to get a rearview mirror.