I'm sorry if I'm going at a slow pace for you, but I just beat Crasher Wake on Pt and I plan on restarting after I used my shiny spread for all the stationaries and roamers (Palkia, Dialga, maybe Giratina, Darkrai, Shaymin, Rotom, Cresselia, Mesprit, Azelf, and then one wild pokemon; Chinchou). I'll go as fast as possible.
But if you want the Shellos ASAP then I can restart this file and abuse for the Modest/Timid HP Grass spread and then once I get the Shellos, restart and go back to this file and then go to the Bold spread. Ugh, I'm really sorry, if I never abused for the starter Piplup I would've have shellos a while ago :(
If you're willing to wait I can definitely give it to you (If I restart now I can get it to you faster). But if you want it like, super fast and someone else can catch it for you I completely understand! So would you like me restart now (which I'm willing to do!) or are you willing to wait?