[Start trials with a MTB bike]

Thanks a lot for your replies. Very helpful point of views.

[Start trials with a MTB bike]

I'm planning to start learning trials primarily to improve my skills at MTB. I currently have a 26 MTB bike that I don't use very much (I ride with a 29er).
Considering that my main goal is to improve for MTB, do you think I could practice trials with the MTB bike I have, or it would be better to get a trials bike? 

I guess is harder to learn with a MTB, but i don't know how it would be to learn with a trials bike and then try to apply that when doing MTB.

I heard that the rims and frame-tail suffer very much when practicing trials, so I'm not sure if it's good to use a MTB bike. Thanks