Free Halloween Coloring Page Featuring Grimmstone from Slugterra

This Halloween I am creating 5 different coloring pages featuring Ghouled Slugs from slugterra. Today’s Slug is 1 of 5 featuring the Grimmstone!

The Grimmstone is the ghouled version of the Rammstone slug. They have a pinkish belly, Blue stripes and a dark maroon back. Grimmstone has sharp teeth and red eyes making them appear unnatural and evil. Grimmstone slugs are made by engulfing Rammstone slugs in Karum-Zanul or Dark Water. The dark water also makes the Grimmstone far more powerful and increases it’s strength.



At 100 miles per hour, the Grimmstone turns black with a red belly and green fists and horns. The teeth are more pronounced, sticking way out like spikes or shards of glass, giving it the appearance of something from your nightmares ready to shred you to pieces.

Halloween Grimmstoner coloring Page Slugterra SKGaleana image

Check out the specs below for more details on the Grimmstone and it’s attacks.

Grimmstone specs from
Grimmstone: Species #004G
A Famous Slug of this species: unknown
Preferred Habitat: unknown, but more than likely anywhere there is nasty fun to be had
Power Type: Rock Ghoul
Element: Dark Shadow
Rarity: Uncommon
Protoform Abilities: Very strong for its size
Attacks: 5

    Grimhorn: Hard projectile with sharp horns
    Slammerstone: Massive uppercut with huge rocky fist
    Hailstone: Shoots sharp rock fragments from its fists
    Castlerock: Hits the ground hard, causing sharp rocks to shoot up and form large, spiky rock wall
    Rockstorm: Hits the ground and slams rocks up, causing an avalanche of sharp stones

Grimmstone transformation at 100 mph:

To download this coloring page click the image below and save the PDF.
This coloring page is free to download, print and create. I do however, accept donations. Any amount helps keep the hobby alive and allows me to continue to bring my readers awesome printables and coloring pages.
If you donate $5 USD I will email you 5 printable SlugTerra Info cards! You must send me an email with how much you donated and What five slugs you wish to get from the list posted here: Slugterra Info Cards! Be sure to also check out my Slugterra Card game. Collect slugs and battle opponents in epic slug battles!

Amount you wish to Donate

To download this free coloring page click the image below and save the PDF to your computer.
Halloween Grimmstoner coloring Page Slugterra SKGaleana

I have also included this free Wallpaper found on Simply click on the image and save the jpeg.

If you print and color this Slug, take a Picture or scan it. I would love to share your art on my facebook page!
If you have a specific Slug you would like to see made into a coloring page, let me know in the comments below, it may be the next one I create 😀

Get my other Slugterra Coloring pages by clicking here
You can find Burpy (Infurnus) and the others!