Mamotte Syugogetten! spawned a decent amount of merchandise. Items went from anywhere from coffee/tea mugs to pillowcases and towel sets. You can find images of some items in the back of the M!S fan guide (focused on the manga), as well as the OAV and TV guides. Here's a quick rundown of the merch that was produced for the series:
» Animation "cels" - AT
» Binder with special printed lined paper - AT
» Card Holder - AT
» CCG (Collectible Card Game) - M
» CD-ROM - M
» CDs (singles, radio, series music) - AT/AO
» Cellphone straps - AT/M
» Christmas tin with cookies and zipper pull - AT
» Clip-on mascot - AT
» Clocks - AT/M/AO
» Cloth Shinto prayer pouches - AT
» Coffee mugs - AT/AO/M
» Collectible dolls - AT
» Day planner kits (with stickers and mascot keychain) - AT/AO
» Desk calendars - M
» Dressable Colorforms-style doll - AT
» DVDs - AT/AO
» Exclusive manga-based box set (with Kennen plushie and other goodies) - M
» Fans (large and small) - AT/AO
» Garage Resin Model Kits - AT/AO
» Gashapon figures (with clear blue and clear white rare/variant versions) - AT
» Gashapon enamel pins - AT
» Glasses - AT/AO
» Handkerchiefs - AT
» Illustration books - AT/AO/M
» Incense dish - AT
» Keychains (plushie and plastic) - AT
» Lami cards - AT/AO
» Magnets - AT
» Mascot badges and enamel pins - AT/AO
» Mechnical pencils/pens and calligraphy marker - AT
» Mini Notepads - AT
» Mirror shaped like the Shitenrin - AT
» Pillows - AT
» Pillowcases - AT
» Postcards and postcard binders - AT/AO/M
» Posters (regular, clear, "life" size) - AT/AO/M
» Puzzle in woven box - AT
» Stamps - AT
» Shijitaki (normal, clear) (special shijitaki and shijitaki binder) - AT/AO/M
» Stationary - AT/AO
» Stickers - AT/AO
» Telephone cards - AT/AO/M
» Towels - AT/AO
» Trading cards and stickers - AT/AO/M
» UFO Catcher (convention exclusive) - AT
» VHS label kit - AT
» Voice recorder - AT
» Watches (pocket watch and wrist watch) - AT
» Windchime (Silver) - AT
» Windchime (Japanese style) - AO
» Wrist rest - AT
» Zipper pulls - AT
Key:
AT - Anime TV style
M - Manga style
AO - Anime OVA style
