On the minimize page, the following changes must be made:
The moves Stomp, Steamroller, Body Slam, Dragon Rush, Flying Press, and Phantom Force hit with double power and never miss* against a Pokemon that has used Minimize.
In Generations 1-5, Minimize has 20 PP. The moves listed above still check evasion as normal, and only Stomp and Steamroller have their power doubled.
In Generations 1-4, Minimize only raises Evasion one stage, and users of Minimize do not receive double damage from Steamroller. (although this edit may be trivial due to the fact that steamroller didn't exist back then.)
In Generation 3, the moves Astonish, Extrasensory, and Needle Arm hit with double power against a Pokemon that has used Minimize.
*unless the user of Minimize is in a semi-invulnerable state due to use of fly, dig, dive, phantom force, bounce, sky drop, or shadow force.