@Cat-Man, where they were kept every time... I'm not so sure. I know I remember seeing them in the tree kangaroo exhibit I think in 1996. I feel like they may have been in the old lion tailed macaque exhibit in 1988 but that's recalling a memory from when I was six so lets not trust that.
They were brought in each time only to serve as a summer exhibit. All belonged to San Diego and left at the end of the summer they arrived... accept the last set who both died here. Their deaths at the zoo may be why we haven't had them since.
These are the koalas who have visited.
P.B (F)
Born: 1980, WILD
Transfer: 16 Jun 1988, Toronto Zoo
Died: 20 Aug 2002, Lincoln Park Zoo
Offspring: Billi (F)
Nutsy (F)
Born: 29 Jun 1983, San Diego Zoo
Father: Koobor
Mother: Velvet
Transfer: 16 Jun 1988, Toronto Zoo
Died: 25 Aug 1997, Lincoln Park Zoo
Offspring: Unnamed (M)
Mugana (M)
Born: 26 Oct 1993, Busch Gardens Tampa
Father: K’Bluey
Mother: Kiami
Transfer: 13 May 1996, Toronto Zoo
Died: 24 Nov 2009, San Diego Zoo
Offspring: Coonabraran (F)
Brisbane (M)
Cooladi (F)
Allora (F)
Rokeby (M)
Bamba (M)
Sooky (F)
Tekin (M)
Miah (F)
Tonahleah (F)
Coolongalook (M)
Born: 16 May 1994, San Diego Zoo
Father: Sid
Mother: Banjeeri
Transfer: 13 May 1996, Toronto Zoo
Died: 22 Sep 2004, Planckndl
Offspring: Taree (F)
Bungles (F)
Caloundra (F)
Ditchie-Doonkuna (F)
Doowi (M)
Born: 20 June 1996, Redwood
Father: Clarry
Mother: Gidgee
Transfer: 1 May 2002, Toronto Zoo
Died: 7 Oct 2002, Toronto Zoo
Offspring: Thoar (M)
Quamby (M)
Born: 25 Sep 1996, San Diego Zoo
Father: Blinky Bill
Mother: Sweeny
Transfer: 1 May 2002, Toronto Zoo
Died: 26 Jun 2002, Toronto Zoo