I was thinking about some cleanup on our naming conventions for squirtle, and if we were to build a tech tree for him, here is what I propose.
First off, all of our advanced techniques come out of shellshift.
SHELLSHIFT
the first subtrees out of shellshift are hydroplane, which is defined as an action out of the ending of shellshift, and shellsling, which is an action out of a jump at the beginning of shellshift, from these two subtrees we can order all the remaining techniques, I'm only listing techniques that I think are actually usefull, so correct me on any omissions if you disagree
Hydroplane
Hydroplane F-smash
Hydroplane JC Grab (Hydrograb)
Hydroplane-jump (Hydrofake, I'm just listing this since it's an important mixup for hydrograb, when people predict the grab jumping out of hydroplane cover's all their counter-options)
Hydroplane Backcrawl (HydroReversal)
Hydroreversal-Pivot-Grab
Hydroreversal-D-tilt
Hydroreversal-D-smash
Hydroreversal-shield
Hydroreversal-Fsmash (a retreating F-smash out of hydroplane)
Hydroreversal-Usmash
Hydroplane Wavedash (Hydrowave?, lol, water puns)
Hydropivot (it's own subtree of ATs)
Hydropivot-Shield (Hydroshield)
Hydropivot-D-smash (IMO just better than Hydroplane D-smash
Hydropivot-Forward-F-smash (best version of this move IMO)
Hydropivot-Jab (Shellshank, actually really useful)
Shellsling
Shellsling-Aerials
Shellsling-Nair (Cannonball)
Shellsling-Bair (Spear)
Shellsling-Fair (Boomerang, especially if you don't use C-stick, instead hold the control stick therefore have a boomerang effect)
Shellsling-Uair (Can't think of a good analogy)
Shellsling-Dair (Twister, does anybody actually use this?)
Shellsling-JC-U-smash (Shellectric Slide, this move isn't really a hydroplane since you shellsling then cancel the jump squat into u-smash, I floated "Shellectric slide" as a name for mooncrawl, but it wasn't actually a slide, however this move, being very convoluted, could use a simple name and it's one of squirtle's best ATs, so I think shellectric slide works)
Shellsling-BReversal-Watergun (Gunsling, super awesome fakeout)
Hydroplane obviously has it's own subtree in hydropivot, which outside of hydrograb is the most important Hydroplane to learn, as you can hydroplane-dsmash and forward hydroplane f-smash more reliably. Also hydro-pivot into shield is just flatout amazing (and the shield is instant unlike wavedash-shield, which is still good)
I think that the Shellsling Aerials should be a subtree. The shellsling Fair is interesting in that it's only really usefull to blindside an opponent from behind with a fair while they are above you, this is accomplished by holding the control stick as you fair, you get a cool boomerang effect as squirtle's fantastic air friction reverts all the shellsling momentum, hence the nickname "boomerang".
Shellsling-uair is a fantastic combo extender but
i'm not sure what name would fit it
Shuriken
Hydroreversal is a new subtree (and the newest AT), and I haven't really explored it yet, but it obviously belongs in the hydroplane Tree. Sometimes when I'm shellshifting in neutral to bait, the opponent does something that isn't actually very punishable (such as Ike's quickdraw ATs), so this whole Hydroreversal subtree would be a great answer to that
BTW, this hydro-crawl stuff needs it's own thread while we figure it out.
http://smashboards.com/threads/hydro-crawl-hydro-reversal-at-exploratory-thread.361694/