Thanks to the Wii U Virtual Console's unique feature of being able to create instantaneous save points that can be reloaded ad infinitem, I decided to download an old favorite, one I consider an absolute gem: Megaman Battle Network (#2 in the series in this case, of 6 if you don't count the fact that every number from 3 onward is offered as two distinct versions, though with only minor differences). It and every other volume was released for Gameboy Advance, although #5 was re-released on the DS where both versions are playable (though that was probably my least favorite of them due to a massive change-up in how the overall mechanics worked).
It's not quite the same platforming Megaman you're used to, he's merely a Tron-like internet persona among a host of other standard or unique 'Net Navi' (navigator) avatars for people of all ages in a technologically-advanced world. Evil Navis and other threats, mainly computer viruses personified in different ways, are the main adversaries and, like Pokemon, simply defeating someone's Navi will cow their full-grown adult operator into surrendering to Megaman's operator, an elementary school student. Exploration makes it feel like a true RPG in a 3D world reminiscent of a variable Game Grid, again, like something out of Tron, and battling is amazingly challenging even if the underlying principles are very easy to pick up on. I can't recommend this game enough, it's much better than the first (though I did like how in the first game, your HP was automatically restored after each battle even if that reduced the level of challenge), and better than the third game, though I did like the 3rd better than the first. I never played versions 4 or 6 but I suspect they'd be roughly equal to my enjoyment of part 3 as long as they did not share the divergence in how things worked in part 5.
The main reason the instantaneous save points appealed to me are somewhat like the reasons they appeal for playing older Zelda titles; if you're not sure if going down a certain path will simply force you to retrace your steps because you went out the 'quick exit' by mistake, this can help you avoid having to trek all the way back up. Also in a difficult fight or boss fight, you can ensure your health doesn't run out by giving yourself a second chance to dodge an attack or tackle the boss with the benefit of now having a better idea of their tactics and capabilities. But mainly, every time you find a randomly-generated treasure gem, you can reset instantly to have another chance of getting the absolute best possibly prize which, when money is as hard to come by early on as it is, really, REALLY helps. Anyway, if you can get the Wii U downloadable version, I'd highly recommend that over the original. At first I was worried because the game pad is bulkier than a Gameboy Advance (and especially more than a Gameboy Advance SP), but the controls are remarkably easy to adjust to since, apart from start, select, top L and top R, there are only A and B to be used.)
There's a lot to do and collect if you want to get your money's worth (for $7.99 on the virtual console, it's well worth it and then some); there's a ton of stuff to do in a New Game+ and collecting all possible codes for all battle chips is challenging but possible, as is scoring the highest rank in battle against the most challenging foes, as well as creating the most unbeatable battle folder full of your best and strongest chips. I wish they'd remake the series in this style instead of the Megaman Star Force style they've gone with for the DS generation (not that that series doesn't have its charm). I think giving the Battle Network approach a 3DS makeover would be amazing.