To be clear, I have my own parameters for this list. Yes, I KNOW Pokemon Yellow is an original Game Boy game. It makes the list because of its dual compatibility (has a special Game Boy Color mode: changes color scheme based on location and can display more than the standard 4 colors at one time; maxes out at 6 colors I think, but every pokemon retains their own color palette).
I'm also making an exception for the other 2 GBC Pokemon games and the oversize carts (different shape or color than the standard black carts).
I think the list is fairly comprehensive (North American releases only), but I'm bound to be missing a few (so please let me know if there are any more that you guys know of).
I may even add pics of each game at some point (not that I'll even own more than a fraction of them, but I can copy paste well enough

Reasons for the list and/or my fascination with the games:
- I couldn't find a complete list anywhere else (please link one if there is one you know of)
- It's one of the early examples of downward compatibility (Sega and Atari have got it beat if nothing else)
- Black GBC games represent a tie between generations
---(GB users had the basic gameplay while GBC users had an enhanced experience)
- It made the original Game Boy (and pocket) still relevant for way longer than I ever though possible
- It shows how cool Nintendo was
- The games are possibly playable on the widest range of platforms
---GB,GBP, GBC, GBA, GBA-SP, Super Game Boy (SNES), Game Boy Player (Gamecube), and even through the N64 Transfer pak, if you just count Pokemon Yellow/Silver/Gold)