The major studios roll their own software, so you can't get it unless you work there.
Otherwise he should learn Tune Boom Harmony, it's used to make the Simpsons, Rick & Morty, etc. It's not cheap, $900/yr, although they have a lite version for $180. Not sure on student pricing. Not sure on tablet; I'm sure at that level they're using a wacom or something similar more than iPads.
But really, it's not about the software...it's about other things. #1 the story/plot, #2 interesting characters, and somewhere waaaaay down the list is the quality of the animation. I mean, Red vs. Blue made millions of $'s...look at Southpark, or even the Simpsons. Animation for TV these days is limited to a few key frame animators here in the US, and the vast, vast majority of people doing animation as a job are in Asia working for pennies on the dollar to fill in between keyframes or even storyboards.
If he's interested in production, or post-production, have him learn Adobe After Effects or Premiere and work on some of his own projects. You can do a lot in those for a decent price. But really if his heart is set on animation, it's not about the tools, it's about being a good artist. Nail it on paper and those skills will transfer to electronic.