Yu-Gi-Oh! » Rulings Q&A

Hi, I wanted to know if I understand correctly. I have an Invoked Oceanus in the EMZ and my opponent attempts to use Sky Striker Mobilize - Linkage! while they have a Sky Striker Ace - Zero on board. Would they be able to send the Zero for the Linkage? I thought that you couldn't because Oceanus makes it so monsters go the banish instead so "send 1 other card you control the GY" wouldn't be able to happen. My opponent argues that because Oceanus says "instead", that it could still resolve and just banishes the Zero instead.