EDIT: Sorry for taking so long with this, I've been busy and it slipped my mind until recently, but here's a video of me doing the Bonus Game mash with handcam:
(Sorry for the resolution being squashed also, I had been recording something else previously and forgot to reset the output resolution, but this was a very good mash so I didn't want to try to reproduce it right now.)
The second boss was really badly played but I somehow didn't die so it's fine lol, and I unfortunately whiffed the last hit on the third boss a couple of times which lost a few seconds. Other than that the run was pretty solid IMO with mostly only some minor mistakes throughout (and I nailed that jump off the first spring in Stage 4 on the first attempt which was incredible since it is extremely finicky.) Sub-7:30 is obviously possible and a good goal I think but I probably don't care enough to grind it out unless somebody beats my time.
Played on a Gamecube with a Game Boy Player and the original US NTSC game cartridge.