Suffice to say the name's a Japanese Englishism
for Pocket Monsters, sort of mutated creatures, the phenomenon beginning in the land of the rising yen as a Game Boy game - where players have to capture each other's Pokemons - and rapidly escalating into comics, toys, CDs, books and, the curse of the world's playgrounds, trading cards.
The words "home court ties" and a few other Englishisms
stick in Stoppard's head.
The book was a bestseller in France but this edition hasn't been altered for the British market, otherwise we'd have thoughts on Englishisms
such as that seventh pint of heavy, or eating a whole packet of Hob Nobs in front of Friends, or pushing a Frenchman down the stairs.
They gave their computer laldy and it came up with nearly 2,000 colourful and commonly- used Scottish words that simply cannot be replaced by dreich Englishisms