Yes, mostly because I wanted to level grind, and battling the E4 without items was a handy way to do so. If I made it past the 2nd one and then bought Full Restores, and Revives I'd gain more than enough to continue my hoard of items.
Badge Case [Time Badge] StrifeHart is my OTP. services performed at BSC: 2 Riley's Boyfriend on the Pokemon BW2 & X boards. W2 FC: 3783 7001 3142
Brock, Misty, Surge Bugsy, Whitney, Morty, Claire Brawly, Wattson, Flannery, Norman, Winona, Tate and Liza, Wallace Can't remember for G4 None in G5
Not on the same game of course, and it's normally all due to one Pokemon/tactic (Scyther, Miltank, Gengar Hypnosis, Kingdra's lack of weakness making her too difficult due to the low levels of Pokemon in GS, Torkoal, Slaking/Vigoroth, Altaria [!!], Milotic).
I hate grinding, only ever did it in BW(2) due to how absurdly easy they made it.