Re: helpful hints needed for beating the mysterious figure with terra
Urgh, Terra is the hardest to beat the Figure with because of his crappy movement abilities. I know, because on the PSP I defeated him with Terra first and it had cost me over 70 tries.
Aqua has it much easier against him because her barrier blocks from all sides (even in the air!) and with double jump she can simply overjump some attacks.
Ventus is so small and agile he can often simply outrun/outroll or outglide the attacks of the Figure.
The Invisible part is really the most annoying one and the most effective one is indeed to stay always on the move.
Blocking doesn't really work anymore because when the Figure turns invisible he starts to use two attacks at the same time (i.e. summoning clones and Raging Firestorm concurrently or using Tornado immediately followed by Mega-Flare.)
Moves such as Mega-Flare, Meteor, the Tornado or Raging Firestorm also cannot be blocked at all.
Since Terra's dodge is so crappy, it is advised to chain his dodges together with a surge command because this gives invincibility too and actually allows Terra to dash further than with his normal dodge.
Going in a broad circle at the outside of the arena is recommended with the camera focused towards the middle to observe what exactly is coming your way.
Always dodge sideways, never forward or backwards.
By "unavoidable Laser attack" I suppose you mean his "laser whip". In BBS Final Mix you can evade that attack because it no longer stuns you the whole time, allowing to air-dash out of it.
If you mean the flying drones shooting laser"spears", those are indeed impossible for Terra to fully avoid because of his slow dodge (Aqua can block them while Ventus is fast enough with dodging), so you need to block some of the spears with renewal block and have a cure command at the ready.
Luckily the Figure rarely uses the drones while invisible.
The Tornado as well as Mega-Flare and Meteor need consecutive dodges sideways to be avoided.