Series 3 monsters came as premiums for three different products.
#73-80 were premiums for Nabisco Shreddies in Canada. Big Boy had a
Secret Monster Pack with Series 3 figures #73-80. Which
ones of these is not really sure yet. #81 was a
premium for the Nintendo M.I.M.P. game.
The figures came in four neon colors: blue, green, orange, pink,
and also in yellow and dark purple with the Big Boy special.
On the monsters #82-96 if have very few information.
It's quite sure that they were never released. Scott Andrew Hutchins
recognized at least the names of the missing 15
monsters in the Argentine sticker book from Cromy Club (in alphabetic order):
Achelōus
Of these, only Troll unquestionably appeared in the comic books.
Bash Tchelik appeared on the centerspread of the comic book #3, but
this makes it unclear if he was ever assigned a number, or if he was part of an aborted fifth series that would have had the numbers of the Super Creepies. (Information by Scott Andrew Hutchins)
Nabiscol Shreddies, Series 3 figures #73-80
Big Boy Secret Monster Pack, Series 3 figures #73-80 ?
Nintendo M.I.M.P. game, Series 3 figure #81
Figures:
Ankou
Banshee
Catarenha
Djinn Shapeshifter
Genie
Grendel
Hairy Boggart
The Headless Man
Hieracosphinx
Hodag
Jabalius
Sciapod
Tálus
Troll
73.
Leviathan 
74.
Abominable Snowman 
75.
Anubis 
76.
Amphisbaena 
77.
Centaur 
78.
Orobas 
79.
Siren 
80.
Jimmy Squarefoot 
81.
Blemmyea 
82.
?
83.
?
84.
?
85.
?
86.
?
87.
?
88.
?
89.
?
90.
?
91.
?
92.
?
93.
?
94.
?
95.
?
96.
?