For the main game character is in principle not required, but it represents an interesting addition. Also, the collecting gene is addressed. One would indeed somehow then have all the figures.
Randy comes as also the product photo shows one of the usual blister packaging of collectible figurines. The figure itself has to be taken not even for simple games from the pack - which keeps the value high. The built-in RFID chip works by the plastic package perfectly. However: If you want to put bonus coins at the figure, one can not therefore unpack the figure, as otherwise the chips Disney Infinity constantly trying to read and do not play really is possible.
And what can Randy? His special ability is the invisibility (as in the film precisely). If you play with him Monsters University main story, it has some advantages, as it is simply not seen - which is extremely useful in a stealth game. In addition, I have the impression that he can jump a bit higher than the contained in the Starter Set Sulley.
Otherwise Randy can of course also be used in the Toybox and in multiplayer games, and how all the characters he can level up to level 15.
The level up is anyway important, since one level per one rotation in the Toybox Tresor gets unlock more toys, components and functions.
Conclusion: Randy looks stylish, the figure is like all Disney Infinity figures beautifully designed and very detailed.
