*points to the bottom one* I actually have this - well, a very similar one... here's a pic:
I got it from a marketplace overseas for cheap. The Pokemon Crystal game was the real thing (well, a ROM, but it was Crystal nonetheless), although it had some glitches. One of my boxes corrupted any Pokemon I put in there (their name changed into weird symbols and kept expanding across the screen until the game froze), I could change the day by flying, or just using my Pokegear (useful for battling at Viridian Trainer Hall, or for the Radio Tower prizes, and other day events...), and so forth. I also recall that shortly before it died, I had encountered a Magikarp...
...which used Explosion. I kid you not. Game froze afterwards. XD
The other game advertised itself as Pokemon 'Diamond' (this was well before the 4th gen, though), and the box tried to make it out as a proper game as well... but it's merely just a cover for a game which then stops talking about Pokemon. 'Twas really an engrish version of a 'Telefang' game (there's another one called Pokemon Jade, as someone mentioned) - which involved creatures called electric-monsters (some which looked downright ugly, and had names ranging from Osie, to 'Ice Cream'... (that one however looked... bleh), which could talk, and evolve through level up, or being merged with items (which ranged from Hammers, to Machine Guns...) Basically crazy stuff that made little but hilarious sense thanks to the engrish. Yay for poor translation! Super effective attacks, for instance, gave the text "For the clever opponent, injure increase!" Oh, and they also asked about whether I had curry or not. -_-
Fun and challenging stuff though - had 3 on 3 battling, and really, really annoying mazes. (In caves which had e-monsters a good 10 levels higher than your were and could move multiple times in a row. AND due to the poor pirating, if you lost the save data got corrupted and you had to start all over again >_<)
Anyway, this article here gives quite a good summery of many of those fake games (many already shown in pictures above)...
https://trsrockin.com/fakegames.html