Surprising as it may sound, MOST trainers are quite capeable of performing basic aerobatics - Hammerhead stalls, loops, rolls, inverted flight (do this one AT LEAST 3 mistakes high ).
Agreed. I have the Midwest Aerobat and have been practicing the latest Sportsman Pattern schedule with it. Yea, a pattern plane is more stable in the manuvers, but the trainer handles them just fine too.