You mean september 9 2015 right? If you're going from scratch you're honestly not going to make it. This isn't a slight on you in any way, you just need to change your priority from fast to good.
Spriting from scratch is pretty much the same as making a good drawing. Do the basic shapes as a lumpen stick figure, then apply lineart, then shade. If you've never done it before, your first "sprite" will probably take 3 hours and not look fantastic. Lots of practice (seriously heaps) will get you faster and with better looking sprites. You should be able to churn out pikachu's at a rate of 1 every 15 minutes or so, as he's not overly complex. But you still need to make about 20 sprites just for get hits, preferably an animated stance, 4 frames there, 4-6 for walk, 4-6 for jumping. Guard, attacks etc etc. A decent character can be made with about 150 sprites. But that's the bare minimum. I've seen characters with 3 sprites that are meant to be fighters (not lolboss stuff) and they're 100% awful. Including FX, sff files often reach over 1000 sprites.
You then need to learn to code which is a whole other experience. A character CAN be made in 3 days, they tend to be a bit lazy. I've done a character in 2 weeks, but i had nothing else to do and a decent amount of motivation for once.
Making a game, awesome. Making pikachu, also awesome. Making any other pokemon, awesome as well. Locking yourself into next month... less so. Just go with it and release it when you're done, don't set yourself any dates, you'll be forced to break them.
D-Day