Some tier 3 monsters are such powerhouses or have such useful abilities that they can still be useful by end of the game (for example Red Chocobos with incredible movement, high stats, and access to Chocobo Meteor, a very powerful far-ranged attack with no cost and no charge time), but most monsters will end up with no real use other than breeding a coveted tier 3 monster in their species line, or easy poaching of rare items/equipment
Release Date: September 27, 2013
If Gaston - Pure Paragon does make it out onto the board, he's certainly battle-ready, with ten strength, six willpower, and the Rush ability
Zakeel : "No way man, I cannot believe that just happened!" Nomura : "Is it that rare
The same applies for the Lucavi