Suicine's niche is definitely as a space dependant character and theres always the training dojo to get a basic understading and combo game (for anyone). For Suicine though field phase has a chance for interesting setups between the ice wall, the ice ball drop and just general projectile heaven. Also mirror coat (the green dome move) destroys opposing projectile games and nets nice counter damage if you time it.
Although one should note that some setups with suicine are kinda slow (but good after knockdown on opponent) and also linear to a degree (they dont track enemy movement well/ easy to side step). Otherwise suicine is a good ranged starter/intro since the tools are there but theres no fancy complex/ timed combos like Sceptile (and others) has.