Thanks, I like your fusions, but I bet you do yours A LOT quicker than mine. I take hours.
Lol I hate Kyurem. I wonder why they gave it Endeavour lol. I caught it without much trouble, I only lost two members, and I caught it with a great ball.
In FireRed I don't think that the Masterball is exclusively for any Pokémon, espcially Mewtwo - because you can always save beforehand. If anything, I think it should be used for shiny Pokémon and roaming legendaries (in this case, Eintei, Raikou or Suicine). But you definitely shouldn't use it on Horsea, lol. I used mine on a Manetric in Sapphire because I thought it was shiny... turns out it wasn't lol.