What is the storyline for Pokemon tower defense?

[wiktoriaa39]

The game is really fun, and I have played it up until Mt.Moon.(the part where brock asks you to defend his geodudes) I can't go any further in the game because I am only allowed to play on saturday for 4 hrs, and I and VERY curious on what happens next. Please put detail!

 

[God.]

I remember to play that game a long time ago,or had seen a youtuber playing it...

 

[Basketman]

Looooooooooong time ago, I loved it. I hope you’ll like it as much as I do. But I only watched it, never played it ahah.