As mentioned above, every change that's applied to ARAM—be it a champion, item, or rune change—will also apply to Poro King!
9.24 Buffs
KARTHUS : [-6% damage dealt ] ⇒ Normal
KAYLE : [-6% damage dealt & +6% damage taken ] ⇒ +6% damage taken
KENNEN : [Normal ] ⇒ -5% damage taken
OLAF : [Normal ] ⇒ -5% damage taken
PYKE : [Normal ] ⇒ +5% damage dealt & -5% damage taken
RENEKTON : [Normal ] ⇒ -5% damage taken
SION : [-8% damage dealt & +10% damage taken ] ⇒ -8% damage dealt & +8% damage taken
ZYRA : [-8% damage dealt & +8% damage taken ] ⇒ -6% damage dealt & +6% damage taken
9.24 Nerfs
CAMILLE : [+8% damage dealt & -8% damage taken ] ⇒ +6% damage dealt & -6% damage taken
JAYCE : [+5% damage dealt ] ⇒ Normal
JHIN : [-8% damage dealt ] ⇒ -10% damage dealt
KASSADIN : [-5% damage taken ] ⇒ Normal
KHA'ZIX : [+8% damage dealt & -10% damage taken ] ⇒ +8% damage dealt & -8% damage taken
LEONA : [Normal ] ⇒ +5% damage taken
NAUTILUS : [+5% damage taken ] ⇒ +8% damage taken
NOCTURNE : [+10% damage dealt & -12% damage taken ] ⇒ +8% damage dealt & -8% damage taken
QIYANA : [+12% damage dealt & -10% damage taken ] ⇒ +8% damage dealt & -8% damage taken
RYZE : [+8% damage dealt & -5% damage taken ] ⇒ +5% damage dealt & -5% damage taken
UDYR : [+10% damage dealt & -10% damage taken ] ⇒ +8% damage dealt & -8% damage taken
YORICK : [-5% damage dealt ] ⇒ -5% damage dealt & +5% damage taken
ZAC : [+5% damage dealt & -8% damage taken ] ⇒ +5% damage dealt
Runes
PRESENCE OF MIND : [20% mana restore, increase max mana by 100 per kill, increase max energy by 10 per kill ] ⇒ 10% mana restore, increase max mana by 50 per kill, increase max energy by 5 per kill (maximum mana and energy remains at 500 and 50, respectively)
Bugfixes
SLOW DOWN SUPERMAN : Super minions no longer have extra movement speed
SPEAR OF SHOJIN Spear of Shojin has been properly removed from ARAM