Welcome back, JonLeung.
I would have to nod affirmatively in regards to all the comparisons except for Kirby and Unicron. My reason? Unicron is not Pink.
Thanks!
Yes, while the colours were the original reason for matching the others up, I couldn't deny the fact that Kirby and Unicron are both round and have a major appetite. Plus, I wanted something a bit more fun and different to end the chart with. (Though they're both orange, at least when Kirby has absorbed a power in Kirby's Adventure. A pink Unicron would be odd, that's for sure.)
It's speculation at this point, but Kirby could probably destroy planets too, if he took Captain Falcon's Falcon Punch power before doing the Megaton Punch mini-game as seen in Kirby: Super Star...