If we're being serious: For Shikamaru, I think Keiko can just kite him from a distance while Panashe does something clever below ground (just in case he actually does get her).
For Hinata/Chouji : It's the last match. Have Keiko chug enough of Nobby's chakra water to get to 50% overcharge, she summons Pankurashun and (Insert Pangolin Here, probably Pangaya) in Round 1, and starts sniping with (Frozen Skein aimbot + PH empowered + Fate Point buffed ) kunai with Weapon 4 explosives attached.
Whoever is fighting Keiko in the championship is fucked.