ive searched a bit on the ike forums but i havent seen any talk of ike's FS being techable. Now i am very sorry that i am a total nobody on these forums, and that i have no proof as to what i say, but here is my story.
A friend and i wait in line at E for All for the 1v1 friendlies behind the actual ffa tournament. i pick booze, he picks ike. nothing worth mentioning happens until he gets the smash ball. he hits me with his slash, and as i am being barraged with ike's multiple strikes i think to myself, i wonder if i can tech out of it when he slams me down. i casually push B (crappy wiimotes) and lo and behold, i must have hit within the 20 frame window as bowser rolls up on the ground. A FS is supposed to kill, not only cause (a respectable) ~60 damage.
i havent posted this until now because i thought it wasnt too big of a deal and i assumed someone else would have already found out. Now this is probably the reason ike's FS was changed, but it still slams the opponent to the ground. just letting you al know that the old FS was techable and the new one may be as well.