Well after testing the 150-in-1 some more, there are a few noteworthy games on it:
35. Super Popo's Adventure
This one seems to be a Teletubbies themed pirate original using the same engine as Pocket Monster. The main gameplay difference between this and Pocket Monster is that the game takes place underwater for no apparent reason, so the controls sort of work like the underwater stages of Super Mario Bros.
102. Fish War
I was expecting this to be the Nice Code game, but this is actually an underwater themed hack of Balloon Fight where (as far as I can tell) the platforms are invisible. It's credited to BBG on the title screen and the Balloon Trip mode was removed.

(Thankfully, the original version was included as well)
150. Orchard Kavass
This one is yet another rehash of Scuba Hunt or whatever it's called, except this is set in a forest. It's the Buzz Bombers ripoff, in case you're wondering.
Also worth pointing out that out of the 150 games, 3 of them (by my count) were repeats, not counting Probotector II or the fact that there are two hacks of Jackie Chan's Action Kung Fu on it.
Also worth pointing out that the sound on my Famicom's not working at the moment so I can't test that yet. >_<
Edit: Well after testing this on my Famiclone, it does work properly. And after playing the aforementioned games again, Super Popo's Adventure has the exact same soundtrack as Pocket Monster while Fish War completely replaces the soundtrack and removes the sound effects for no apparent reason. :huh: