Snubbull sneaks up on mantine while it's watching TV and bites mantine on the tail just before it uses surf, to secure itself to mantine's tail (which the surf shouldn't hit) during the attack.
If this wouldn't work, snubbull instead uses feint attack to vanish and move onto mantine's back (which again, the surf shouldn't hit), then stomps on mantine.
If this wouldn't protect snubbull from the surf either, snubbull instead uses strength to break off a chunk of the wall and make it into a shield to protect snubbull from the attacks.
And if even this can't save poor snubbull (in which case the surf should destroy the house, as the walls are clearly susceptible to it) snubbull protects from the surf.
You honestly have the very best posts in this game. Thank you for being so very creative.
~Gryoine