I'm a Mario guy but I have to give this one to Sonic.

Jak & Daxter II - Overall awesome game. Good story, character and the addition of weapons was welcomed.
Rachet & Clank II - Didn't play it (unfortunately) but if it is anything like up your arsenal, I'm all for it.
Super Mario Bros 2 - Pretty meh.
Sonic The Hedgehog 2 - Never played it or seen it.

I guess i'll give it a shot now that I have the means. I've never been a big sonic fan and the only game I ever bought was Sonic Heroes for the PS2 which was alright.

I do really like Sonic Battle, scratch that, I love Sonic Battle.

At first I read that as "Mario and Sonic vs. Ratchet and Clank vs. Jak and Daxter," like, as though "Ratchet and Clank vs. Jak and Daxter" itself was a thing, and I was like, "Did I miss something?!"

Klonoa beats them all and I even really like most of those on the list.
Sparkster needs love as well as Mega Man. Still Klonoa beats them all

WHOA WHOA WHOA...........

Youve never played SONIC THE HEDGEHOG 2 ?????????

Faints....................

1. Sonic 2 - An all time classic for me
2. Ratchet 2 - A great evolution in the series
3. Mario 2 - An odd game, but still fun
4. Jak 2 - A massive backstop and killed my interest in the series

Sonic 2 - Best sonic ever.
Ratchet 2 - an amazing step forward from the first one, varied gameplay and one of my fav games on the ps2.
Mario 2 - one of the least if not the least favorite mario game I ever played.
Never played a Jak game, but I will.

Nope, granted I missed in a lot of gaming since I lived in Colombia until I was 10 and then in Belize until I was 14 (I'm 23 now, for reference)

Needless to say, there wasn't much gaming done back in those days, until i got my hands on emulators.

Ratchet & Clank 2 - Awesome game, alot more enjoyable than the first.
Jak & Daxter II - Worst game Naughty Dog have made but still good.
Sonic the hedgehog 2 - Great game, downloaded through the PSN, thoroughly enjoyed it.
Super Mario Bro's 2 - Haven't played.