Yes it is in fact inserting the game will unlock extra features in Earl's Academy.
You can't make the eggs hatch faster, but you can play Pokemon Crystal Version on the Nintendo 64 with Pokemon Stadium 2 which has an option to increase the gamespeed.
Mewtwo isn't unlockable in Pokemon Stadium 2. You will need to register it from either Red, Blue, Yellow, Gold, Silver, or Crystal version.
Sadly you can not. You can transfer Pokemon from red, blue, or yellow version up to crystal, but crystal, gold, and silver version are not compatible with ruby, Sapphire, or emerald and onwards. It is due to a new way of saving the data that makes up a Pokemon in the newer generations.
If you can trade Pokemon from crystal version to gold version my guess is yes
To trade Pokemon from Pokemon Crystal version to another version of Crystal you need to use a link cable. You can also battle this way.
In Pokemon Crystal Version, a Heracross will occasionally appear when you use headbutt on trees.
Crystal version.
yes you may. the versions that are compatible with blue version are yellow and red. you will need a cable link, link it with other players and then you can trade or fight. *Gold, Silver and Crystal are also compatible if you are sending Pokemon found in the Kanto region, and that know moves that were in Gen 1. ~Bambi231991~
In Goldenrod city, but only in the Japenese version of Pokemon Crystal.
Your rival is named Rival and he's the same rival from Gold, Silver, and Crystal version. His official name however is Silver.
you can't.
By trading one from gold/silver and cloning it Dani (the girl Pokemon trainer on Pokemon crystal version) By trading one from gold/silver and cloning it Dani (the girl Pokemon trainer on Pokemon crystal version)