Have you ever tried catching a Pokemon for some reason other than if it's shiny or legendary, that you know you could catch another time, but you wouldn't give up? Post your stories ^_^
Sometimes, yes. I just wasted a bunch on the Snorlax East of Vermillion a couple minutes ago... but I was looking for a specific nature, so there's my excuse. Other times I'll do it when the Pokemon--common or not--has a higher level than average for that location (like a level 6 Mankey West of Viridian, at the start of the game).
I just wasted a load of balls on a Steelix because I needed it in my Pokédex. I still didn't catch the damn thing, and it fainted three of my Pokémon. Oh well.
In GS, I got obsessed with Delibird, the most insanely difficult non-legendary to catch, even harder than Snorlax. The thing would run away, break out of twenty Ultra Balls with 1 HP left, Paralyzed. Skarmory was also quite difficult.
I remember that I tried to catch a shiny Snorlax on Firered. The poor thing ended up with about 3 hp and I froze it with an ice beam..... I trew a Master ball(Traded it from Leafgreen)...... I turned off the game beocuse it was a stupid idea and never saw the thing again*sniff*.....*sniff*..... I'll get you one day Snorlax!!!!!!!
I once remember using all of my Pokèballs trying to catch a Skarmory...the only Pokèmon I had around its level was my Gardevoir and my Blaziken. I had, like...a whole bunch of Great Balls, a few Ultra Balls, and several Pokè Balls...and I STILL didn't catch the darn thing...So I gave it a Blaze Kick to the face and left.