Hast Thou Slain the Jabberwock?
oOo CODE, score 0

Thanks to Dennis for golfing the Brainfuck code.

TwASbRIlLIgAnDthEsliTHyTOvEsdiDgyreaNdgImbleinthEwaBeaLlmimSywEreThEBoroGoveSAndTheMOmERaTHSoutGRabEbeWArEthEjaBbeRWockMYsONtHEJawsTHaTBiTEThecLawSthATcaTChBeWAReTHeJuBJuBBiRDAndsHUNtHeFRuMIoUSbANdERSnatchheTooKHisvORpaLswORdinhAndLonGtiMetHEmanXomEFoEHeSOUg


Try it online!

I've got bad news for this challenge... :(

oOo CODE is just a binary encoding of brainfuck which uses the case of a letter for each bit. So yeah, since the poem is long enough (or the output short enough) to cover a Brainfuck program that prints The Jabberwocky (without actually trying hard to golf it), this becomes a trivial optimal answer.