Sanrio Timenet (サンリオタイムネット) - Trade features (Monsters, Items, Money, Location Information)

In Sanrio Timenet: Kako-Hen and Mirai-Hen (Past and Future Versions), you can use the Link Cable with another game on another Game Boy to trade not just monsters, but also items (except key items), money and also transfer location information.
Like the battle feature, this is accessed from a Hello Kitty rest house after choosing "computer" (コンピータ) and then "link with a friend" (ともだちと　つうしんする).
Options are モンスター (monsters) (sub-options are パーティー (party) and ときのはしら (pillar of time, i.e. monsters in the PC), アイテム (items) (sub-options are てもちのアイテム (items on hand), and あずけたアイテム (deposited items), おかね (money), じょうほう (information), おくらない (put off trading).
(Although I tried the information trading option, I wasn't sure how it worked, except it's related to the information entries for various locations.)