lickitung became stronger in jungle where it can use loads of psychic pokemon, there also good counters to mewtwo; ensureing quick energy absorbtion cannot overwelming you
quote from my favourot wesite:
"Lickitung becomes even stronger in the Base–Fossil format, where it
can utilize a variety of Psychic-type Pokémon that offer additional ways
of dealing with Hitmonchan. These Psychic Pokémon also serve as a
convenient counter to Mewtwo, ensuring decks cannot overwhelm you
with early pressure from a quick Energy Absorption attack."
