To pre-acclimatize for Kilimanjaro, hikers can hike at other local mountains in the Kilimanjaro region. There, they will experience altitude changes similar to Kilimanjaro.
Mount Kenya and Mount Meru are two mountains that offer a good introduction to challenging altitudes for climbers who have not done this before.
Altitude training systems are also available. Although they are not necessary, they can greatly help travelers prepare for hiking with less oxygen at high altitudes.