oh okay. usually i'll do it on stage, just to add % and when my opponent's % is high, i'll get them with a dSmash and then dSpecial just for the crowd to yell and for the fun of it.Using flipjump onstage is almost always a pretty bad idea, to be honest. The predictable trajectory makes it hard to punish, the kick has a lot of landing lag, and there's usually a better option to do. Use it on stage to escape sticky situations because of the invincibility frames.
It's much better offstage, when you're recovering.
Hold a suit piece and put up your shield. Roll. In the midst of the roll, pick a direction on the C-stick. If you timed it right (it's really not tight timing at all) you just performed a glide toss.
also.
i use it like this, i'll dash attack and hit my opponent untill they fall off the stage, then dSmash x2 then dSpecial but sometimes i'll dSmash once and then flip jump.
oh okay thanks, i've been trying to do the slide forever.