Negima, not that familiar with it actually. Sailor Moon, Ranma and company nuked the time gates into non-existence just barely in time to prevent their entire dimension from suffering catastrophic reality failure because the time gate was monkeying with time travel. As for Doctor Who, I believe that dimension is categorically labeled as "off limits" and everyone is surprised it still exists.
Regarding tech, they would likely never encounter any tech from the Whoverse because nobody is insane enough to go there. TYPE-MOON to my knowledge mainly deals with amoral mages and beings of godlike power, not advanced technology. Sailor Moon's tech mostly turned out to not actually be from the Silver Millennium. It was either found by the time gate (the silence glave) or was created by the Senshi during one of the many attempts the Time Gate made to recreate the Silver Millennium. And while it was interesting, the tech proved inferior to Ranma and company's phones. The tech in Metroid isn't actually all that impressive either. Well, the ability to digitally download physical weapon systems and weapon upgrades into a biological system. Oh, and form missiles/bombs from the corpses of random critters. As for the Kirby series, the tech there is again not generally speaking that impressive. The impressive tech is generally magic fueled clockwork tech or pure magic.
Also, I'd probably suggest that staying well away from Nanoha's branch of the multiverse is a Good Idea.
