Peco practices among college students at the training center in preparation for the Inter-High preliminaries. When Koizumi learns from Obaba that Peco is still playing table tennis, he registers Peco for the event.
Fine. If that's the case, I'll register him, too.
Muy bien. En ese caso, 
lo registraré también.
Tudo bem. Se é assim, 
também vou registrá-lo.