I will keep this post updated as the challenge goes by!
Day 1: My first video game was Super Mario Advance for the GBA. It's a shame I can't find the cartridge.
Day 2: My favorite video game human character is Cynthia from DPP. My favorite non-human character is Empoleon from Pokemon. (Yeah, I really Pokemon more than other vg franchise.)
Day 3: I find Fossil Fighters and Fossil Fighters Champions for the DS a very underrated series. They're really fun strategy games similar to Pokemon, but with dinosaurs.
Day 4: I really don't have one...Minecraft maybe?
Day 5: Cheren from BW/BW2.
Day 6: Navi from Ocarina of Time.
Day 7: Mario and Peach (Does that even count?)
Day 8: Pokemon DPP
Day 9: PMD Sky ending scene
Day 10: Pokemon GSC
Day 11: Currently, it's the 3DS. (All time favorite is the DS)
Day 12: Super Smash Bros
Day 13:
Every Game I've ever played Pokemon Platinum
Day 14: Some Pokemon wallpaper
Day 15: I can't :( (But I'm currently playing Pokemon Crystal)
Day 16: COD
Day 17: Cyrus from Pokemon DPP
Day 18: Lucas/Hilbert from Pokemon
Day 19: Castelia City from Pokemon (Unova).
Day 20: RPGs
Day 21: Pokemon White
Day 22: Pokemon White 2
Day 23: All Pokemon games, but preferably Generation 4's games.
Day 24: Pokemon RBY
Day 25: Legend of Zelda: Breath of the Wild
Day 26: COD
Day 27: Basically any Pokemon cute scene. (I don't play too much not Nintendo/Pokemon games)
Day 28: Game Freak
Day 29: Pokemon S/M, I thought the changes were too drastic at first, but I ended up loving it.
Day 30:
Pokemon Platinum!