bladeofapollo
Smash Ace
First of all, I would recommend NOT practicing on 1-player mode; it removes the C-stick. Instead just put the computer on level 1 in a timed match w/ time limite 'None.' That way you can keep practicing and not have to worry about the match ending OR the C-stick. If the computer starts to bug you, just plug in a dummy controller or give yourself a handi-cap so you can push it away further.Is there anything else i can practise in 1player mode? Other stuff then needs to perfect in a match? I'm glad about any advise/suggestion!
Otherwise, practicing that stuff is useful. I can't think of much else other than DJC'ing on platforms, but that's up to you really.