I somehow remain intact on the Hill's lake after the blast, having very quickly somehow shoved the entirety of my palace (water and all) into my impossible subspace pockets. Also, I think that they were a one-gender race, and that gender is not male. Also, I don't really know why they did that, actually. They gave me altogether all too much stuff, some of this is probably more than enough to save their stagnating civilization. It's like it's all a convenient plot device to ensure that I basically would become invincible-OH WAIT

In any case, as it took eons to get here and Mermaids somehow do not age (I said it would), ergo giving me eons to actually set up the inevitable counterattack. You are accosted by Regirock before you get very far, who has somehow been conveniently waterproofed. You scoff; Regirock is a rather weak legendary all things considered, discounting the massive Defense value. How can it really hurt you, supereffective attacks aside?

It turns out Regirock already thought of an answer to that, coats the Battlefield in Sand with a Sandstorm, then uses the Sand to effectively boost his pathetic speed far beyond what's normal by simply manipulating it to push him. You do not expect such sudden speed from him, so you are crushed underneath a rocky tomb. You respawn immediately, and find Regirock not five feet from the HosPITal, who introduces you to how to make Stone Edge unbeilevably awesome.

It's a messy introduction.

You retreat to the Jamboree for protection only to find Regirock somehow having penetrated the hull and massacring everything between you and it. Coincidentally, it's a very big ship. You go to fight him off now that you're somewhat more prepared for the inexplicably awesome Regirock.

Meanwhile, I decide to fix the major issue by sending all the mermaids onto a single rocket ship that I have just devised, and sending everything to a new terraformed planet that I just made. Except, not 'just made' as I had eons. The Mermaids quickly leave, enter a new planet similar to the one I left Earth in pre-deflooding, and expand and grow and yadda yadda yadda supreme galactic empire in hours just add water. The Mermaids thank me by firing a massive laser into the Jamboree without warning, obliterating you. Regirock somehow survives, and you are again transported to HosPITal, again having to figure out a way to defeat your near-invulnerable foe.

Meanwhile, I just keep my hill.

MY HILL!!!