After Beating Story Mode, defeating the Final Boss of Access Ark, and watching the Credits, the next you enter Story Mode, the game will show a message saying that you've unlocked the "Ability Testing Area". While Kirby is in the Access Ark Hub, go to the right of Access Ark 6-2 to enter the "Copy Ability Testing Room". The "Ability Testing Area" is an area filled with two sections that have all of the game's Copy Abilities. In the main area is a Metal Waddle Dee and some tiny Star Blocks that Kirby can use to practice his Copy Abilities. The second area there's a Robobot Armor, its Mode Abilities, some enemies, and hidden items. You can also come here to grab a particular Copy Ability, leave using the Warp Star, and keep it so that you use it for certain Stages. However, you can't take the Robobot Armor out of here.