Ignoring Wi-Fi Johns...
Match 1: Needs more zoning. Mario spent too much time spacing and thus not staying in Ike's range, where he has the advantage. Edgeguarding needs to be more aggressive too. Quick Draw is silly easy to gimp with the combination of FLUDD and Cape. Lastly, I only saw F-Smash being used as a kill move. U-Smash and D-Smash works too. Ike stayed alive for each stock quite long.
Match 2: This match is a better performance, but some problems in Match 1 carried over to here too. What I saw most is a lack of camping (then again, this Snake was more inyoface). Whenever you're ahead a stock but have a high amount of damage, you seriously have to camp to focus on racking as much damage as possible before you get KO'd. That way you still have a realistic advantage. I saw Mario get KO'd right as the opponent respawns too, which is bad. Ledgecamp if you have to.
Again, this is ignoring the uglyness of WiFi.