Omg, yes the Wrap move irritated me so many times...! >_> I once was Paralyzed AND confused too and some Ekans of a Lass (seriously, what Lass would train a "scary snake"? xD) used Wrap on my Charmeleon - "Charmeleon is Paralyzed", "Charmeleon hurts itself in its confusion!", and then the agonizing 8th attack streak of Wrap finished him of... :(
The lame sprites kinda bugged me the most though xD They were so PIXELATED! i remember training my Magikarp for an awesome Gyarados in my team, and when it finally evolved, it was just kind of an "improved" Magikarp sprite, the only thing that was different where the 3 horns Gyarados has attached to it... The back sprites of Magikarp and Gyarados looked alot like... just if you were still having a Magikarp :(
Also, alot of other Pokemon had very bad sprites too. Anyone remembers Koffing for example from R/B? I also got very irritated with the back sprite from Charmeleon, looks waaaay to chubby imo >_> Blastoise was way too round and don't get even started on the sprite of Moltres... terrible xD (but still kinda fun too though)
Also have had alot of annoying memories about Rock Tunnel. That was always a thing I hated doing in every new Save File xD I knew I had to do the "Rock Tunnel" again later in the game >_> always went through it without Flash, and I did it so many times in the dark that I could determine based upon the talking some trainers near the exit do when you battle them, if I was already almost out of that cave or not xD First time I ever played Blue it took me 2 hrs or so to get through it without Flash! 'cause I didn't know which way to go ofcourse... xD