How is my lineup for Pokemon Soul Silver. Blastoise, Infernape, Sceptile, Tyranitar, Walrein, Metagross?

It is very good but since you already have blizzard on blastoise, why not change out the walrein to something else? Switch infernape's solarbeam to u-tun, keep leaf storm but change frenzy plant to energy ball, and maybe change tyranitar to a different pokemon because you already have two pokemon that know earthquake plus its ability would snap all but metagross's hp.