I use Raptor boost out of a stutter step; i.e....dash the complete opposite way of my opponent, and then raptor boost towards them. I also use it as a tech chase when I KNOW which direction they're going to roll (prediction, etc.)
I also (unlike....like....all of you....rofl.....xD) use it as a bait move; I'll totally just throw it out sometimes when my opponent won't approach me, then they'll try and dash at me to grab me while I'm experiencing ending lag.
Ending lag ends before they get to me.
I shield Grab them.
Aerial....Game. Blouses.
...hahaha.
I also use it as an offensive recovery (scaring people at the thought of a potential spike), planking (although Up B is way better for that), annd...that's it.
Other than that, it shouldn't be used often. Against good players, over using RB will get you punished. They'll grab you, they'll hit you with a smash attack, they'll....
they'll get you o_o
hahaha. Use it with caution, and use it sparingly, because using any move with that much lag on it always has a risk VS reward.....and a player should always factor in whether or not the possible reward is worth the possible risk.
In this case, it's usually
never worth it, imo.