Lego Ghostbusters Brickheadz: Peter and Slimer 2 Pack was a Ghostbusters two pack set from Lego was released on July 1, 2018.
Information was found on Lego Shop.
Brickheadz Peter Venkman & Slimer
Bust some ghosts with LEGO BrickHeadz Peter Venkman & Slimer!
These LEGO® BrickHeadz™ 41622 Peter Venkman™ & Slimer™ construction characters are fun to build using colorful LEGO bricks that recreate all of their iconic details, including Venkman’s slime-covered uniform and detachable proton pack, plus Slimer’s big green grin and two hot dogs.
- Buildable LEGO® BrickHeadz™ construction characters feature decorated eyes and authentic details from the blockbuster Ghostbusters™ movie, including Peter Venkman’s uniform and proton pack, plus Slimer’s hot dogs.
- Each LEGO® BrickHeadz™ construction character comes with its own buildable collector's baseplate.
- Have fun growing your LEGO® BrickHeadz™ collection with other characters from your favorite films, TV series, games and comics.
- Mash up your LEGO® BrickHeadz™ construction characters to create supercool hybrids or your own amazing characters.
- Ghostbusters™ toys stand over 2” (7cm) tall without baseplate.
- Baseplates measure over 1” (4cm) square.
On May 15, 2018, Lego revealed the 2 pack. 
On June 8, 2018, the July 1 release date was revealed as part of Ghostbusters Day's press release. 
- The Peter figure is slimed, a nod to when Peter was slimed by Slimer in the first movie.
- The Slimer figure is holding hot dogs, a nod to Slimer's reappearance in the first movie after he is released from the Containment Unit.
Instruction manuals are provided in PDF format. Currently, the files are hosted externally on Lego.com.
- Peter (6248198) (may be printed on US standard letter size paper)
- Slimer (6248200) (may be printed on US standard letter size paper)
- Peter (6248197) (may be printed on EU standard A4 paper)
- Slimer (6248199) (may be printed on EU standard A4 paper)
- ↑ Lego Facebook 5/15/18
- ↑ Ghostbusters News "Lego Reveals Ghostbusters Brickheadz Release Date" 6/8/18
All photos in this section were taken by Paul Rudoff.