Summary of the hot spring ep:
Ash & co. pays a visit to a hot spring resort run by the family of Yumomi, another childhood friend of Dawn. They jumps into the outdoor hot spring, but the water is freezing cold and they can't stay inside. They ask Yumomi why, but...
updated version from TV Tokyo site:
http://www.tv-tokyo.co.jp/program/detail/19406_200801171900.html
During the travel to Veilstone City where the next Gym is located, Dawn suggests they take a refreshing hot spring tour and so they pays a visit to a nearby hot spring resort run by the family of Yumomi, another childhood friend of Dawn. Yumomi and Dawn are extremely excited to see each other again after a long separation. The guys can't wait to take a break and enjoy the time and they jumps into the outdoor hot spring all at once, but there is little water in the spring and the water is cold and it's impossible to stay inside. They find Yumomi and ask her why, she says there is no longer spring water coming out of its source. To find out why that happens, Ash and friends begin the investigation together with Yumomi and her Swinub.
Summary of the Gliscor ep:
When Ash is training Turtwig, a crowd of the "Fang Scorp Pokemon" Gliscor & "Flyscorpion Pokemon" Gligar begin to attach Ash & co.
(& I guess this is when Turtwig manages to master Energy Ball)
Summary of the Hippowdon ep:
When our heroes' Pokemon are having a fun time in a sandpit, a Hippowdon appears from within. However the over-curious Pachirisu can't help peeping into the mouth of Hippowdon and accidentally falls into it...
Summary of the Lucario ep:
Ash & co. finally arrives at Veilstone City. In the forest outside the town, they witness the firce battle of a female martial-artist and the "Aura Pokemon" Lucario. The girl is revealed to be Maylene, Gym Leader of the city. On knowing that, Ash asks for a gym battle immediately, however...