Ok, very shortly after posting that PAR code I worked out how to activate the cheat menu normally!
As soon as you turn on the power, hold buttons 1+2 and rotate the D-pad clockwise. There is no indication that the cheat menu has been activated but you will know if it's worked when you go to start the game.
How are you finding these, ian? You're the code master!
I'm just waiting for my copy of the game to arrive, but I'm excited to try it - the videos I've seen on YouTube make it look a lot more solid than a franchise game of this sort has any right to be. Thanks for the code.
"Enduro" is a symbolic journey through life via the media of a race.
I did a bit of research into other Dominic Wood games. There's Lemmings, The Terminator and Battlemaniacs, as well as Lion King and Jungle Book as Phil mentioned, which all have similar cheats already known (the Terminator one being the least similar). His name shows up in readable text in all these games and no others in the SMS library.
There's also a hex string (a non-game-specific part of the cheat entry code) that shows up in 5/6 of these games: db dc cb 57 28 which shows up in no other games. So I think we've exhausted that possibility