Digimon Xros Wars Episode Four!

[Guilmon and a shotgun]

Star Ax was pretty cool. The Code Crowns really do look like SD cards.

...

Cool fight. They seem to maybe not be able to breath underwater like that one part in Tamers.

I think the SD cards were a really nice touch, really shows that Digimon are in fact data and didn't fall from the sky like Pokemon.

Also, I think with Tamers since they were all early teens their imaginations were alot more active, and as stated in the storyline of that episode all they have to do is believe so strongly that they can breathe the water and it'll work.
Although saying that, Taiki seems to be pretty open to the quest he's just embarked on, and doesn't seem that disoriented by the appearence of strange creatures that can talk...i dunno, maybe he's watched as much Anime as the rest of us that it just seems to stick.