[EricH]

Do I get a bonus for naming them all? Or just a "you've been here too long"?

2x floppies (1999's Double Trouble)--and how you saved 2 I'll never know.
1x basketball (2012's Rebound Rumble)
1x Orbit Ball, moon-rock class (2009's Lunacy, AKA "the OTHER game that shall not be named")
1x white ring inner tube, which is most likely from 2011's Logomotion but could theoretically be from 1997's Toroid Terror. (The game piece type was also used in 2007, but only in red and blue.)

5 game pieces from 4 different years. And the robot is designed to handle none of them.