Here is the full list of all 15 Drawfighters trophies - there are 11 bronze and 4 silver.
You have levelled up a fighter to level 5
You have finished Guacamole Volcano
You have won 5 fights in a row
You have knocked out 10 fighters
You have finished Quesadilla Volcano
You have finished TexMex Volcano
You have won 10 fights
You have won 25 fights
You have won 50 fights
You have knocked out 50 fighters
You have knocked out 100 fighters
You have knocked out a fighter with a single blow
You have lost 10 fights in a row
You have won 10 fights in a row
You have unlocked 20 skills for your fighters