one criticism on your move-set for sceptile. with D-throw being a reliable combo throw and healing him what is the point of the other throws? would you always always want get that extra heal. I think his pummel should be buffed slightly and d-throw not heal him.
I love his specials and his Final smash though. Synthesis/Solarbeam would be awesome to see IRL (like project M Ivysaur)
But I gave every other throw a use? Or at least I tried to. F-Throw has the potential to kill at higher percents, even earlier against characters with bad recovers due to the angle it would send opponents (down and away). And it would also set up very nicely for an off-stage Energy Ball which has the potential to kill pretty early. B-Throw would force a tech up to let's say 50-60% even higher with bad DI, read their get up and you get yourself a free Leech Seed. I feel like B-Throw is better than D-Throw at these percents, unless you already have a Leech Seed on your opponent. U-Throw would also be better if you want to juggle them above you with U-Airs. This would be possible with D-Throw at some percents, but eventually they would be able to DI away and only F-Air and N-Air would work. U-Throw would stop true comboing earlier than D-Throw, but it would allow for dangerous 50/50s that D-Throw doesn't at higher percents. The throw you use really depends on a lot of different things, and depending on the character, their percent, where they are on the stage, and what your rage is every throw would have its use.
Need to get a Leech Seed? B-Throw.
Combo across the stage with F-Airs and N-Airs? D-Throw
U-Air juggles? U-Throw
Grabbed their ledge get up? F-Throw
50/50 at kill percents? U-Throw
Need a little extra healing to make you feel safe? D-Throw
Think of Sceptiles D-Throw like Charizard's but it heals 2%. At low mid percents it's a great combo throw. But once your opponent DI's away at kill percents there isn't much you can do. Sure you can hit a Fair or a Nair at higher percent, but at that point they aren't going to link to anything else, and they aren't going to kill either. Any amount of rage makes it stop working even earlier. So even though you could true combo with F-Air or N-Air at up to about 90%, it's unlikely to ever happen because of Rage and DI.