Casper

Now it's up to Casper and Dr.

Harvey's daughter, Kat, to find a way to rescue Dr.

To accomplish this task, they must find seven cellular integrator capsules located throughout the Whipstaff Manor.

Once found, the capsules can be used in the Lazarus Machine.

This machine has the power to cure Dr.

Harvey from his predicament.

Players take control of a floating Casper, who is followed by Kat throughout the Manor.

Gameplay consists of Casper picking up items that he will be able to morph into, enabling him to fight off various enemies and to also assist Kat in getting through the mansion unscathed.

Examples of some of the items Casper can turn into are a butterfly net, a pillow, and a plunger.

Casper also has the ability to turn invincible as a defensive maneuver.

Casper can leave the screen that Kat is on, but if he strays too far away from her, she will be abducted by a ghost.

Casper for Game Boy is currently worth €14.84 loose, €42.61 complete in box, and €97.99 factory sealed. Prices are based on real sales and update regularly on Gamevaro.

Casper has a steady sales history on the tracked marketplaces, meaning it trades hands regularly and isn't considered particularly rare.

Loose means cartridge or disc only, CIB (complete in box) includes the original box and manual, and sealed means factory-sealed and never opened. For Casper, loose is €14.84 and CIB is €42.61 — CIB commands a premium because original boxes and manuals are fragile and often don't survive.

The PAL version of Casper is currently worth €14.84 loose, versus €10.51 for NTSC-U. Regional price differences usually come down to print run size and regional collector demand.