Fight Night Round 3 Hints

Beat the Burger King Event on Career Mode. Then next time you select a Trainer to....train with just keep going down past the $50,000 trainer and he'll be selectable as a trainer. He also gives you Heart when you fight.

Its easy to get all of the achievements because ther all sponsor fights heres how to get them:

Win The BK Invitational Fight. 1. Burger King Achievement - 100 points
Win the Dodge sponsored fight. 2. Dodge Achievement - 100 points
Win any EA SPORTS sponsored fight. 3. EA SPORTS Achievement - 150 points
Win any ESPN Friday Night Fight event. 4. ESPN FNF Achievement - 150 points
Win any ESPN Pay Per View fight event. 5. ESPN PPV Achievement - 150 points
Win any ESPN Wednesday Night Fight event. 6. ESPN WNF Achievement - 150 points
Win the Everlast sponsored fight 7. Everlast Achievement - 100 points
Win the Under Armour sponsored fight. 8. Under Armour Achievement - 100 points