Well this just hit me today and I wonder if anyone have the skill enough to actually do a Zero/Slayers cross over. However my idea is this, No Louise does NOT summon Lina but instead she summons Gourry Sword of Light and all. Now imagine if you can if the first thing after being told that he was Louise familar and what his job entitle would be that it wouldn't be his first outing guarding flat chested sorceress. How well do you guys think that would go over?
Now of course we all know Lina is a sorceress genius extradinare, one would think she would be possessive about gourry and would literally tear Halkagenia apart to get Gourry back. Now I think it would be fun if Lina shows up and demands Gourry back but Louise refuses. Just a crazy though.
Route two of course could entile Zelgadis being the summoned one but he knows magic and I was hoping for a none magic user to the series. Just a few thoughts.