STD wordplay

I was just playing in Cobalt Coastlands and was about to leave, but a Space Time Distortion appeared, so I decided to stay for that. It ended up being pretty disappointing, Pokémon-wise (no alphas, no shinies, don't need any more Magnemite).

So I turned to my fiancé and said in a joking way "Man, I'm sick of these lame STDs; I want the good STDs". Then he said "Gotta catch 'em all".