Hydroplane u-smash
Description- As Squirtle comes out of his pivot, he slides a big distance while unleashing a u-smash. The u-smash can be charged or uncharged.
How to perform- Do a shellshift, and when you're heading in the opposite direction (but still in the pivot animation), input Up+A at the same time. Hold A if you want to charge it. If you turn Tap Jump off, you'll need to hit Up+Jump(X/Y)+A. How much you slide depends on the timing of your Up+A - maximum distance should be about 2/3 of Final Destination. This applies to all hydroplane techniques - timing is important.
Hydroplane d-smash
Description- As Squirtle comes out of his pivot, he slides a big distance while unleashing a d-smash. The d-smash can be charged or uncharged.
How to perform- Do a shellshift, and when you're heading in the opposite direction, hit the c-stick at a 45 degree angle between the down position and the position opposite from where you're facing. If you want to charge the d-smash, press Z as you c-stick and hold it. This can travel nearly the entire length of FD if timed perfectly (and charged).
Hydroplane f-smash
Description- As Squirtle comes out of his pivot, he slides a big distance while charging an f-smash, eventually releasing it.
How to perform- Do a shellshift, and when you're heading in the opposite direction, hit the c-stick away from where you're facing and hold Z (or any Attack input). You should be charging an f-smash aimed backwards. Note that the f-smash must be charged because it stops any sliding momentum you have when you release it. Aiming the f-smash forward (in the direction of your slide) is also possible. You need to input an extra direction - just before you c-stick you'll want to hit backwards one more time, then c-stick in the forward direction. The time between the backwards on the analog stick and the forwards on the c-stick should be so small that Squirtle doesn't actually turn around a second time. So to smash forwards, you need to shellshift, then hit backwards on the analog stick, forwards on the c-stick and Z, basically all at the same time. This can reach about 3/4 the length of FD when fully charged and timed perfectly.
Forward Hydroplane u-smash
Description- Squirtle quickly propels himself forward out of a dash and unleashes a u-smash. He propels himself in the direction he was dashing.
How to perform- While dashing forward, quickly input backwards on the analog stick followed by Up+A. This should be done as quickly as possible for the maximum slide distance. What you're doing is you're shellshifting, cancelling your shellshift with a jump, then cancelling your jump with a u-smash. If you're having trouble with your inputs, think of it as a quarter circle. If you're dashing to the right, you need to do a quarter circle from left to up and hit A. Alternatively, you could hit diagonally up-back on the analog stick while pressing Y+A at the same time. This will register the pivot with your analog stick still in a position to u-smash, while jumping with Y. This is how you'll need to do it if you turn Tap Jump Off.
Hydrojab
Description- As Squirtle comes out of his pivot, he does his jab while still getting the same slide as the hydroplanes.
How to perform- Perform a shellshift, but instead of hitting straight backwards to pivot, hit diagonally backwards-down. Once you're heading the other direction, with the analog stick still held diagonally, hit diagonally backwards-down on the c-stick. To be clear, your analog stick and c-stick should both be pointing diagonally side-down, one on each side, separated by 90 degrees. This can also be done with the analog stick diagonally-up, so your analog and c-stick would form a 180 degree angle instead.
Hydrotilt
Description- As Squirtle comes out of his pivot, he does his Forward Tilt while getting a slightly shorter slide than other Hydroplanes (but the momentum is constant; he doesn't slow down until the end of the animation)
How to perform- Perform a shellshift, and right before you exit your shell, gently tilt the control stick backwards and press A. This will cause you to slide backwards while performing a Forward Tilt. His other tilts do not get a noticeable slide from this method.
Itemplane
Description- Squirtle can perform the hydroplane f-smash while holding an item too. This is most useful in the Diddy Kong matchup, where you can keep holding the bananas while hydroplaning.
How to perform- Same inputs as the hydroplane f-smash.
Hydrotoss
Description- Squirtle will slide the distance of a hydroplane while tossing a held item up or down. Again this is most useful in the Diddy Kong matchup, as it can be used with bananas.
How to perform- Follow the same inputs as a hydroplane u-smash to hydrotoss up, or a hydroplane d-smash to toss down.
Hydrograb
Description- Out of a pivot, Squirtle lunges forward while doing a grab. If the grab lands, he'll slide with his opponent a decent distance. If you reach the edge and they break out when you still have momentum, you'll both fall off, which can lead to a footstool gimp.
How to perform- Do a shellshift, then hit R and c-stick away from the direction you're facing.
Jump-Cancelled Hydrograb
Description- Out of a ShellShift, Squirtle performs a JC Grab and slides a massive distance. If you run into an edge you will likely slide off and momentum is generally preserved even when you perform a throw.
How to perform- Do a ShellShift, then perform a JC Grab (X/Y + Z).
Note: Due to the lack of buffering in P:M, the True Hydroplane technically cannot be performed. However, there is a similar technique (the HydroPivot) explained below which achieves essentially the same effect.
True Hydroplane
Description- As Squirtle comes out of his pivot, he stands up and slides the length of a hydroplane. He is in his standing animation while he slides, so he can do any move.
How to perform- Perform a shellshift, and just before you come out of your pivot, buffer a pivot by hitting back on the analog stick one more time. Timing is the important factor here - if you input the last direction too quickly you won't get much of a slide, and if you input it too late you'll simply initiate a dash backwards.
HydroPivot
Description- As Squirtle comes out of a ShellShift, he performs a short standing pivot animation while retaining full momentum from the SS. It's possible to travel the entire length of FD with this if timed absolutely perfectly.
How to perform- While holding an Attack input (A or another button set to Attack), perform a ShellShift, and towards the very end (possibly right as Squirtle comes out of his shell), flick the C-Stick diagonally up and backward to the direction you face after the SS.