99 lives
At the main menu, hold R1 and press X, O, L2 and a chime should confirm the code.
Bonus level
Finish all of Mr. Spoil’s objectives at the training level. Then bounce on all of the spiders to kill them to unlock a bonus level. Complete the bonus level to view all FMV sequences.
Extra lives
Return to the training level and collect the letters F-L-I-C-K to gain a bonus life. Repeat as often as needed before resuming regular game.
High Flying Bugs
In the levels "ant island", "the tree" and "clover forest", find all the brown tokens to get the cannon plant. Once you've done this, plant a cannon plant and a dandelion. Fly the dandelion into the cannon plant and you'll shoot so high you can fly anywhere on the level.