Looking to borrow: Regice, Regirock, Registeel, Regigas and Deoxys
I can lend: the legendary birds and dogs, mewtwo, jirachi, cresselia and mesprit.
All of this is for the data, I wouldn't mind trading my Jirachi for the four of the regis or Deoxys.
I'm also looking for: slowking, skitty, carvanha, wailmer, cacnea, solrock, castform, kecleon, shuppet, tropius, snorunt, clamperl, shelgon, beldum, shellos, drifloon, glameow, stunky, spiritomb, riolu, finneon, snover, magnezone, probopass (I can give you both nosepass and magneton and you can just evolve them) and rotom.